64988404 has 24 divisors (see below), whose sum is σ = 125088768. Its totient is φ = 29355360.

The previous prime is 64988393. The next prime is 64988471. The reversal of 64988404 is 40488946.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 10852 + ... + 15739.

It is an arithmetic number, because the mean of its divisors is an integer number (5212032).

Almost surely, 2^64988404 is an apocalyptic number.

It is an amenable number.

64988404 is a deficient number, since it is larger than the sum of its proper divisors (60100364).

64988404 is a wasteful number, since it uses less digits than its factorization.

64988404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26655 (or 26653 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 64988404 is about 8061.5385628303. The cubic root of 64988404 is about 402.0486645211.

The spelling of 64988404 in words is "sixty-four million, nine hundred eighty-eight thousand, four hundred four".