64433812 has 24 divisors (see below), whose sum is σ = 115270400. Its totient is φ = 31505760.

The previous prime is 64433783. The next prime is 64433819. The reversal of 64433812 is 21833446.

It is a super-2 number, since 2×64433812² = 8303432257702688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64433819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47893 + ... + 49219.

Almost surely, 2^64433812 is an apocalyptic number.

It is an amenable number.

64433812 is a deficient number, since it is larger than the sum of its proper divisors (50836588).

64433812 is a wasteful number, since it uses less digits than its factorization.

64433812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 64433812 is about 8027.0674595396. The cubic root of 64433812 is about 400.9017406320.

The spelling of 64433812 in words is "sixty-four million, four hundred thirty-three thousand, eight hundred twelve".