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4000000 = 2856
BaseRepresentation
bin1111010000100100000000
321112012222011
433100210000
52011000000
6221422304
745666544
oct17204400
97465864
104000000
112292294
12140a994
13aa0884
14761a24
155402ba
hex3d0900

4000000 has 63 divisors (see below), whose sum is σ = 9980341. Its totient is φ = 1600000.

The previous prime is 3999971. The next prime is 4000037. The reversal of 4000000 is 4.

The square root of 4000000 is 2000.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 3504384 + 495616 = 1872^2 + 704^2 .

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 799998 + ... + 800002.

Almost surely, 24000000 is an apocalyptic number.

4000000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

4000000 is the 2000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4000000

4000000 is an abundant number, since it is smaller than the sum of its proper divisors (5980341).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4000000 is an frugal number, since it uses more digits than its factorization.

4000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 4.

The cubic root of 4000000 is about 158.7401051968.

The spelling of 4000000 in words is "four million", and thus it is an aban number and an eban number.

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 625 640 800 1000 1250 1280 1600 2000 2500 3125 3200 4000 5000 6250 6400 8000 10000 12500 15625 16000 20000 25000 31250 32000 40000 50000 62500 80000 100000 125000 160000 200000 250000 400000 500000 800000 1000000 2000000 4000000