30990168 has 64 divisors (see below), whose sum is σ = 93916800. Its totient is φ = 9390240.

The previous prime is 30990161. The next prime is 30990181. The reversal of 30990168 is 86109903.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30990161) 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, 4146 + ... + 8897.

It is an arithmetic number, because the mean of its divisors is an integer number (1467450).

Almost surely, 2^30990168 is an apocalyptic number.

It is an amenable number.

30990168 is an abundant number, since it is smaller than the sum of its proper divisors (62926632).

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

30990168 is a wasteful number, since it uses less digits than its factorization.

30990168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13069 (or 13059 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 30990168 is about 5566.8813531456. The cubic root of 30990168 is about 314.1048509161.

The spelling of 30990168 in words is "thirty million, nine hundred ninety thousand, one hundred sixty-eight".