634456990 has 8 divisors (see below), whose sum is σ = 1142022600. Its totient is φ = 253782792.

The previous prime is 634456981. The next prime is 634456997. The reversal of 634456990 is 99654436.

634456990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 634456990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634456997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31722840 + ... + 31722859.

It is an arithmetic number, because the mean of its divisors is an integer number (142752825).

Almost surely, 2^634456990 is an apocalyptic number.

634456990 is a deficient number, since it is larger than the sum of its proper divisors (507565610).

634456990 is a wasteful number, since it uses less digits than its factorization.

634456990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63445706.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 634456990 is about 25188.4296850756. The cubic root of 634456990 is about 859.2787309285.

The spelling of 634456990 in words is "six hundred thirty-four million, four hundred fifty-six thousand, nine hundred ninety".