634925990 has 16 divisors (see below), whose sum is σ = 1153964448. Its totient is φ = 251504256.

The previous prime is 634925989. The next prime is 634925999. The reversal of 634925990 is 99529436.

634925990 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 not an unprimeable number, because it can be changed into a prime (634925999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307187 + ... + 309246.

It is an arithmetic number, because the mean of its divisors is an integer number (72122778).

Almost surely, 2^634925990 is an apocalyptic number.

634925990 is a deficient number, since it is larger than the sum of its proper divisors (519038458).

634925990 is a wasteful number, since it uses less digits than its factorization.

634925990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616543.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 634925990 is about 25197.7377952863. The cubic root of 634925990 is about 859.4904092983.

The spelling of 634925990 in words is "six hundred thirty-four million, nine hundred twenty-five thousand, nine hundred ninety".