634210028 has 18 divisors (see below), whose sum is σ = 1146831588. Its totient is φ = 306873960.

The previous prime is 634210021. The next prime is 634210033. The reversal of 634210028 is 820012436.

It is a junction number, because it is equal to n+sod(n) for n = 634209979 and 634210006.

It is not an unprimeable number, because it can be changed into a prime (634210021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78650 + ... + 86337.

It is an arithmetic number, because the mean of its divisors is an integer number (63712866).

Almost surely, 2^634210028 is an apocalyptic number.

It is an amenable number.

634210028 is a deficient number, since it is larger than the sum of its proper divisors (512621560).

634210028 is a wasteful number, since it uses less digits than its factorization.

634210028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165053 (or 165020 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 634210028 is about 25183.5269174117. The cubic root of 634210028 is about 859.1672252172.

The spelling of 634210028 in words is "six hundred thirty-four million, two hundred ten thousand, twenty-eight".