64604736 has 224 divisors, whose sum is σ = 223520000. Its totient is φ = 18289152.

The previous prime is 64604717. The next prime is 64604737. The reversal of 64604736 is 63740646.

64604736 is a `hidden beast` number, since 646 + 0 + 4 + 7 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64604736.

It is not an unprimeable number, because it can be changed into a prime (64604737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592650 + ... + 592758.

Almost surely, 2^64604736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64604736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111760000).

64604736 is an abundant number, since it is smaller than the sum of its proper divisors (158915264).

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

64604736 is a wasteful number, since it uses less digits than its factorization.

64604736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 64604736 is about 8037.7071357446. The cubic root of 64604736 is about 401.2559192069.

The spelling of 64604736 in words is "sixty-four million, six hundred four thousand, seven hundred thirty-six".