64399004 has 6 divisors (see below), whose sum is σ = 112698264. Its totient is φ = 32199500.

The previous prime is 64399003. The next prime is 64399007. The reversal of 64399004 is 40099346.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64399003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8049872 + ... + 8049879.

It is an arithmetic number, because the mean of its divisors is an integer number (18783044).

Almost surely, 2^64399004 is an apocalyptic number.

It is an amenable number.

64399004 is a deficient number, since it is larger than the sum of its proper divisors (48299260).

64399004 is a wasteful number, since it uses less digits than its factorization.

64399004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16099755 (or 16099753 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 64399004 is about 8024.8990024797. The cubic root of 64399004 is about 400.8295368158.

The spelling of 64399004 in words is "sixty-four million, three hundred ninety-nine thousand, four".