64445008 has 20 divisors (see below), whose sum is σ = 124992000. Its totient is φ = 32189024.

The previous prime is 64444997. The next prime is 64445027. The reversal of 64445008 is 80054446.

It is a super-2 number, since 2×64445008² = 8306318112240128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22641 + ... + 25327.

It is an arithmetic number, because the mean of its divisors is an integer number (6249600).

Almost surely, 2^64445008 is an apocalyptic number.

It is an amenable number.

64445008 is a deficient number, since it is larger than the sum of its proper divisors (60546992).

64445008 is a wasteful number, since it uses less digits than its factorization.

64445008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194 (or 4188 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 64445008 is about 8027.7648196743. The cubic root of 64445008 is about 400.9249594763.

The spelling of 64445008 in words is "sixty-four million, four hundred forty-five thousand, eight".