634458990 has 32 divisors (see below), whose sum is σ = 1661129856. Its totient is φ = 153808160.

The previous prime is 634458973. The next prime is 634458997. The reversal of 634458990 is 99854436.

634458990 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 (634458997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960972 + ... + 961631.

It is an arithmetic number, because the mean of its divisors is an integer number (51910308).

Almost surely, 2^634458990 is an apocalyptic number.

634458990 is an abundant number, since it is smaller than the sum of its proper divisors (1026670866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634458990 is a wasteful number, since it uses less digits than its factorization.

634458990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922624.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 634458990 is about 25188.4693858122. The cubic root of 634458990 is about 859.2796338296.

The spelling of 634458990 in words is "six hundred thirty-four million, four hundred fifty-eight thousand, nine hundred ninety".