30990164 has 12 divisors (see below), whose sum is σ = 55698804. Its totient is φ = 15076224.

The previous prime is 30990161. The next prime is 30990181. The reversal of 30990164 is 46109903.

It can be written as a sum of positive squares in 2 ways, for example, as 24010000 + 6980164 = 4900^2 + 2642^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30990164.

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 3 ways as a sum of consecutive naturals, for example, 104549 + ... + 104844.

It is an arithmetic number, because the mean of its divisors is an integer number (4641567).

Almost surely, 2^30990164 is an apocalyptic number.

It is an amenable number.

30990164 is a deficient number, since it is larger than the sum of its proper divisors (24708640).

30990164 is a wasteful number, since it uses less digits than its factorization.

30990164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209434 (or 209432 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 30990164 is about 5566.8809938780. The cubic root of 30990164 is about 314.1048374019.

The spelling of 30990164 in words is "thirty million, nine hundred ninety thousand, one hundred sixty-four".