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64000 = 2953
BaseRepresentation
bin1111101000000000
310020210101
433220000
54022000
61212144
7354406
oct175000
9106711
1064000
11440a2
1231054
1323191
1419476
1513e6a
hexfa00

64000 has 40 divisors (see below), whose sum is σ = 159588. Its totient is φ = 25600.

The previous prime is 63997. The next prime is 64007. The reversal of 64000 is 46.

Multipling 64000 by its sum of digits (10), we get a square (640000 = 8002).

64000 divided by its sum of digits (10) gives a square (6400 = 802).

Adding to 64000 its reverse (46), we get a palindrome (64046).

64000 = 33 + 43 + ... + 223.

The cubic root of 64000 is 40.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 20736 = 208^2 + 144^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 4, base 10 and base 16.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (64007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12798 + ... + 12802.

264000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79794).

64000 is an abundant number, since it is smaller than the sum of its proper divisors (95588).

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

64000 is an frugal number, since it uses more digits than its factorization.

64000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 64000 is about 252.9822128135.

The spelling of 64000 in words is "sixty-four thousand", and thus it is an eban number.

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 640 800 1000 1280 1600 2000 2560 3200 4000 6400 8000 12800 16000 32000 64000