64604385 has 40 divisors (see below), whose sum is σ = 116435880. Its totient is φ = 34269696.

The previous prime is 64604363. The next prime is 64604387. The reversal of 64604385 is 58340646.

64604385 is a `hidden beast` number, since 646 + 0 + 4 + 3 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 876096 + 63728289 = 936^2 + 7983^2 .

It is not a de Polignac number, because 64604385 - 2⁶ = 64604321 is a prime.

It is a super-2 number, since 2×64604385² = 8347453122456450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64604387) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 108649 + ... + 109241.

It is an arithmetic number, because the mean of its divisors is an integer number (2910897).

Almost surely, 2^64604385 is an apocalyptic number.

It is an amenable number.

64604385 is a deficient number, since it is larger than the sum of its proper divisors (51831495).

64604385 is a wasteful number, since it uses less digits than its factorization.

64604385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 64604385 is about 8037.6853011299. The cubic root of 64604385 is about 401.2551925260.

The spelling of 64604385 in words is "sixty-four million, six hundred four thousand, three hundred eighty-five".