64642808 has 16 divisors (see below), whose sum is σ = 121716000. Its totient is φ = 32185216.

The previous prime is 64642771. The next prime is 64642829. The reversal of 64642808 is 80824646.

It is a happy number.

It is a super-2 number, since 2×64642808² = 8357385252249728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14993 + ... + 18816.

It is an arithmetic number, because the mean of its divisors is an integer number (7607250).

Almost surely, 2^64642808 is an apocalyptic number.

It is an amenable number.

64642808 is a deficient number, since it is larger than the sum of its proper divisors (57073192).

64642808 is a wasteful number, since it uses less digits than its factorization.

64642808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34054 (or 34050 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 64642808 is about 8040.0751240271. The cubic root of 64642808 is about 401.3347246548.

The spelling of 64642808 in words is "sixty-four million, six hundred forty-two thousand, eight hundred eight".