30900816 has 30 divisors (see below), whose sum is σ = 86479770. Its totient is φ = 10300224.

The previous prime is 30900803. The next prime is 30900841. The reversal of 30900816 is 61800903.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 8433216 = 4740^2 + 2904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30900816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107151 + ... + 107438.

It is an arithmetic number, because the mean of its divisors is an integer number (2882659).

Almost surely, 2^30900816 is an apocalyptic number.

30900816 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30900816 is an abundant number, since it is smaller than the sum of its proper divisors (55578954).

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

30900816 is a wasteful number, since it uses less digits than its factorization.

30900816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214603 (or 214594 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30900816 is about 5558.8502408322. The cubic root of 30900816 is about 313.8026807410.

The spelling of 30900816 in words is "thirty million, nine hundred thousand, eight hundred sixteen".