634910820 has 24 divisors (see below), whose sum is σ = 1777750464. Its totient is φ = 169309536.

The previous prime is 634910819. The next prime is 634910831. The reversal of 634910820 is 28019436.

It is a super-2 number, since 2×634910820² = 806223498706144800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5290864 + ... + 5290983.

It is an arithmetic number, because the mean of its divisors is an integer number (74072936).

Almost surely, 2^634910820 is an apocalyptic number.

634910820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634910820 is an abundant number, since it is smaller than the sum of its proper divisors (1142839644).

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

634910820 is a wasteful number, since it uses less digits than its factorization.

634910820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10581859 (or 10581857 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 634910820 is about 25197.4367744023. The cubic root of 634910820 is about 859.4835641050.

The spelling of 634910820 in words is "six hundred thirty-four million, nine hundred ten thousand, eight hundred twenty".