30886812 has 48 divisors (see below), whose sum is σ = 87360000. Its totient is φ = 9359280.

The previous prime is 30886789. The next prime is 30886829. The reversal of 30886812 is 21868803.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11812 + ... + 14187.

It is an arithmetic number, because the mean of its divisors is an integer number (1820000).

Almost surely, 2^30886812 is an apocalyptic number.

It is an amenable number.

30886812 is an abundant number, since it is smaller than the sum of its proper divisors (56473188).

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

30886812 is a wasteful number, since it uses less digits than its factorization.

30886812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023 (or 26015 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 30886812 is about 5557.5904850933. The cubic root of 30886812 is about 313.7552692988.

Subtracting from 30886812 its reverse (21868803), we obtain a square (9018009 = 3003²).

The spelling of 30886812 in words is "thirty million, eight hundred eighty-six thousand, eight hundred twelve".