30890938 has 32 divisors (see below), whose sum is σ = 53996544. Its totient is φ = 13124352.

The previous prime is 30890933. The next prime is 30890963. The reversal of 30890938 is 83909803.

It is a self number, because there is not a number n which added to its sum of digits gives 30890938.

It is not an unprimeable number, because it can be changed into a prime (30890933) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20031 + ... + 21517.

It is an arithmetic number, because the mean of its divisors is an integer number (1687392).

Almost surely, 2^30890938 is an apocalyptic number.

30890938 is a deficient number, since it is larger than the sum of its proper divisors (23105606).

30890938 is a wasteful number, since it uses less digits than its factorization.

30890938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 30890938 is about 5557.9616767301. The cubic root of 30890938 is about 313.7692396259.

The spelling of 30890938 in words is "thirty million, eight hundred ninety thousand, nine hundred thirty-eight".