30928860 has 36 divisors (see below), whose sum is σ = 93818088. Its totient is φ = 8247648.

The previous prime is 30928853. The next prime is 30928907. The reversal of 30928860 is 6882903.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85734 + ... + 86093.

It is an arithmetic number, because the mean of its divisors is an integer number (2606058).

Almost surely, 2^30928860 is an apocalyptic number.

30928860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30928860 is an abundant number, since it is smaller than the sum of its proper divisors (62889228).

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

30928860 is a wasteful number, since it uses less digits than its factorization.

30928860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171842 (or 171837 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 30928860 is about 5561.3721328464. The cubic root of 30928860 is about 313.8975824581.

The spelling of 30928860 in words is "thirty million, nine hundred twenty-eight thousand, eight hundred sixty".