30872805 has 16 divisors (see below), whose sum is σ = 50023680. Its totient is φ = 16256448.

The previous prime is 30872797. The next prime is 30872819. The reversal of 30872805 is 50827803.

It is not a de Polignac number, because 30872805 - 2³ = 30872797 is a prime.

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, 11842 + ... + 14211.

It is an arithmetic number, because the mean of its divisors is an integer number (3126480).

Almost surely, 2^30872805 is an apocalyptic number.

It is an amenable number.

30872805 is a deficient number, since it is larger than the sum of its proper divisors (19150875).

30872805 is a wasteful number, since it uses less digits than its factorization.

30872805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26140.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 30872805 is about 5556.3301737748. The cubic root of 30872805 is about 313.7078333623.

The spelling of 30872805 in words is "thirty million, eight hundred seventy-two thousand, eight hundred five".