64633408 has 28 divisors (see below), whose sum is σ = 146580352. Its totient is φ = 27699840.

The previous prime is 64633399. The next prime is 64633423. The reversal of 64633408 is 80433646.

It is a tau number, because it is divible by the number of its divisors (28).

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, 71688 + ... + 72583.

Almost surely, 2^64633408 is an apocalyptic number.

It is an amenable number.

64633408 is an abundant number, since it is smaller than the sum of its proper divisors (81946944).

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

64633408 is a wasteful number, since it uses less digits than its factorization.

64633408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144290 (or 144280 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 64633408 is about 8039.4905311220. The cubic root of 64633408 is about 401.3152704190.

The spelling of 64633408 in words is "sixty-four million, six hundred thirty-three thousand, four hundred eight".