30876720 has 80 divisors (see below), whose sum is σ = 109397760. Its totient is φ = 7057152.

The previous prime is 30876707. The next prime is 30876739. The reversal of 30876720 is 2767803.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 7510 + ... + 10869.

It is an arithmetic number, because the mean of its divisors is an integer number (1367472).

Almost surely, 2^30876720 is an apocalyptic number.

30876720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30876720 is an abundant number, since it is smaller than the sum of its proper divisors (78521040).

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

30876720 is a wasteful number, since it uses less digits than its factorization.

30876720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18402 (or 18396 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 30876720 is about 5556.6824634848. The cubic root of 30876720 is about 313.7210932983.

It can be divided in two parts, 308 and 76720, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 30876720 in words is "thirty million, eight hundred seventy-six thousand, seven hundred twenty".