64704880 has 40 divisors (see below), whose sum is σ = 158360400. Its totient is φ = 24519168.

The previous prime is 64704863. The next prime is 64704901. The reversal of 64704880 is 8840746.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 19765 + ... + 22804.

It is an arithmetic number, because the mean of its divisors is an integer number (3959010).

Almost surely, 2^64704880 is an apocalyptic number.

It is an amenable number.

64704880 is an abundant number, since it is smaller than the sum of its proper divisors (93655520).

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

64704880 is a wasteful number, since it uses less digits than its factorization.

64704880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42601 (or 42595 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 64704880 is about 8043.9343607466. The cubic root of 64704880 is about 401.4631415167.

The spelling of 64704880 in words is "sixty-four million, seven hundred four thousand, eight hundred eighty".