64804644 has 24 divisors (see below), whose sum is σ = 168012320. Its totient is φ = 21601512.

The previous prime is 64804643. The next prime is 64804651. The reversal of 64804644 is 44640846.

64804644 is a `hidden beast` number, since 6 + 4 + 8 + 0 + 4 + 644 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 64804599 and 64804608.

It is not an unprimeable number, because it can be changed into a prime (64804643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299914 + ... + 300129.

Almost surely, 2^64804644 is an apocalyptic number.

It is an amenable number.

64804644 is an abundant number, since it is smaller than the sum of its proper divisors (103207676).

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

64804644 is a wasteful number, since it uses less digits than its factorization.

64804644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600056 (or 600048 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 64804644 is about 8050.1331666004. The cubic root of 64804644 is about 401.6693650257.

The spelling of 64804644 in words is "sixty-four million, eight hundred four thousand, six hundred forty-four".