64856072 has 16 divisors (see below), whose sum is σ = 122382060. Its totient is φ = 32220864.

The previous prime is 64856053. The next prime is 64856081. The reversal of 64856072 is 27065846.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62315236 + 2540836 = 7894^2 + 1594^2 .

It is an unprimeable number.

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, 24563 + ... + 27074.

Almost surely, 2^64856072 is an apocalyptic number.

It is an amenable number.

64856072 is a deficient number, since it is larger than the sum of its proper divisors (57525988).

64856072 is a wasteful number, since it uses less digits than its factorization.

64856072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51800 (or 51796 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 64856072 is about 8053.3267660017. The cubic root of 64856072 is about 401.7755898725.

The spelling of 64856072 in words is "sixty-four million, eight hundred fifty-six thousand, seventy-two".