64808736 has 48 divisors (see below), whose sum is σ = 175996800. Its totient is φ = 20857088.

The previous prime is 64808671. The next prime is 64808749. The reversal of 64808736 is 63780846.

It is a tau number, because it is divible by the number of its divisors (48).

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, 8856 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (3666600).

Almost surely, 2^64808736 is an apocalyptic number.

It is an amenable number.

64808736 is an abundant number, since it is smaller than the sum of its proper divisors (111188064).

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

64808736 is a wasteful number, since it uses less digits than its factorization.

64808736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23321 (or 23313 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 64808736 is about 8050.3873198747. The cubic root of 64808736 is about 401.6778191341.

The spelling of 64808736 in words is "sixty-four million, eight hundred eight thousand, seven hundred thirty-six".