64431012 has 12 divisors (see below), whose sum is σ = 150339056. Its totient is φ = 21477000.

The previous prime is 64430983. The next prime is 64431043. The reversal of 64431012 is 21013446.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 64431012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2684614 + ... + 2684637.

Almost surely, 2^64431012 is an apocalyptic number.

It is an amenable number.

64431012 is an abundant number, since it is smaller than the sum of its proper divisors (85908044).

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

64431012 is a wasteful number, since it uses less digits than its factorization.

64431012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369258 (or 5369256 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 64431012 is about 8026.8930477489. The cubic root of 64431012 is about 400.8959334266.

Adding to 64431012 its reverse (21013446), we get a palindrome (85444458).

The spelling of 64431012 in words is "sixty-four million, four hundred thirty-one thousand, twelve".