30639198 has 24 divisors (see below), whose sum is σ = 62214984. Its totient is φ = 10059280.

The previous prime is 30639187. The next prime is 30639211. The reversal of 30639198 is 89193603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29740 + ... + 30752.

It is an arithmetic number, because the mean of its divisors is an integer number (2592291).

Almost surely, 2^30639198 is an apocalyptic number.

30639198 is an abundant number, since it is smaller than the sum of its proper divisors (31575786).

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

30639198 is a wasteful number, since it uses less digits than its factorization.

30639198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 30639198 is about 5535.2685571705. The cubic root of 30639198 is about 312.9145789279.

The spelling of 30639198 in words is "thirty million, six hundred thirty-nine thousand, one hundred ninety-eight".