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8012020 = 225400601
BaseRepresentation
bin11110100100000011110100
3120002001102111
4132210003310
54022341040
6443420404
7125046442
oct36440364
916061374
108012020
114582605
122824704
131876a53
1410c7b92
15a83dea
hex7a40f4

8012020 has 12 divisors (see below), whose sum is σ = 16825284. Its totient is φ = 3204800.

The previous prime is 8012003. The next prime is 8012021. The reversal of 8012020 is 202108.

Adding to 8012020 its reverse (202108), we get a palindrome (8214128).

It can be divided in two parts, 80 and 12020, that added together give a square (12100 = 1102).

It can be written as a sum of positive squares in 2 ways, for example, as 1920996 + 6091024 = 1386^2 + 2468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200281 + ... + 200320.

It is an arithmetic number, because the mean of its divisors is an integer number (1402107).

Almost surely, 28012020 is an apocalyptic number.

It is an amenable number.

8012020 is an abundant number, since it is smaller than the sum of its proper divisors (8813264).

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

8012020 is a wasteful number, since it uses less digits than its factorization.

8012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400610 (or 400608 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 8012020 is about 2830.5511830737. The cubic root of 8012020 is about 200.1001165417.

The spelling of 8012020 in words is "eight million, twelve thousand, twenty".

Divisors: 1 2 4 5 10 20 400601 801202 1602404 2003005 4006010 8012020