634479988 has 12 divisors (see below), whose sum is σ = 1111283712. Its totient is φ = 316970360.

The previous prime is 634479943. The next prime is 634479991. The reversal of 634479988 is 889974436.

634479988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 62068 + ... + 71563.

It is an arithmetic number, because the mean of its divisors is an integer number (92606976).

Almost surely, 2^634479988 is an apocalyptic number.

It is an amenable number.

634479988 is a deficient number, since it is larger than the sum of its proper divisors (476803724).

634479988 is a wasteful number, since it uses less digits than its factorization.

634479988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134822 (or 134820 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 58.

The square root of 634479988 is about 25188.8862000685. The cubic root of 634479988 is about 859.2891132732.

The spelling of 634479988 in words is "six hundred thirty-four million, four hundred seventy-nine thousand, nine hundred eighty-eight".