64404860 has 24 divisors (see below), whose sum is σ = 145654656. Its totient is φ = 23780160.

The previous prime is 64404859. The next prime is 64404871. The reversal of 64404860 is 6840446.

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, 123596 + ... + 124115.

It is an arithmetic number, because the mean of its divisors is an integer number (6068944).

Almost surely, 2^64404860 is an apocalyptic number.

It is an amenable number.

64404860 is an abundant number, since it is smaller than the sum of its proper divisors (81249796).

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

64404860 is a wasteful number, since it uses less digits than its factorization.

64404860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247733 (or 247731 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 64404860 is about 8025.2638585906. The cubic root of 64404860 is about 400.8416860028.

The spelling of 64404860 in words is "sixty-four million, four hundred four thousand, eight hundred sixty".