64912040 has 32 divisors (see below), whose sum is σ = 146763360. Its totient is φ = 25838400.

The previous prime is 64912019. The next prime is 64912051. The reversal of 64912040 is 4021946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4595 + ... + 12285.

It is an arithmetic number, because the mean of its divisors is an integer number (4586355).

Almost surely, 2^64912040 is an apocalyptic number.

It is an amenable number.

64912040 is an abundant number, since it is smaller than the sum of its proper divisors (81851320).

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

64912040 is a wasteful number, since it uses less digits than its factorization.

64912040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7913 (or 7909 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 64912040 is about 8056.8008539370. The cubic root of 64912040 is about 401.8911283271.

Adding to 64912040 its reverse (4021946), we get a palindrome (68933986).

The spelling of 64912040 in words is "sixty-four million, nine hundred twelve thousand, forty".