64920312 has 32 divisors (see below), whose sum is σ = 180334800. Its totient is φ = 21640032.

The previous prime is 64920259. The next prime is 64920313. The reversal of 64920312 is 21302946.

64920312 is a `hidden beast` number, since 649 + 2 + 0 + 3 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64920313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150063 + ... + 150494.

Almost surely, 2^64920312 is an apocalyptic number.

It is an amenable number.

64920312 is an abundant number, since it is smaller than the sum of its proper divisors (115414488).

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

64920312 is a wasteful number, since it uses less digits than its factorization.

64920312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300572 (or 300562 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 64920312 is about 8057.3141927071. The cubic root of 64920312 is about 401.9081991315.

The spelling of 64920312 in words is "sixty-four million, nine hundred twenty thousand, three hundred twelve".