30790865 has 24 divisors (see below), whose sum is σ = 43413480. Its totient is φ = 20901888.

The previous prime is 30790853. The next prime is 30790867. The reversal of 30790865 is 56809703.

It can be written as a sum of positive squares in 4 ways, for example, as 9186961 + 21603904 = 3031^2 + 4648^2 .

It is not a de Polignac number, because 30790865 - 2⁶ = 30790801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30790867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26129 + ... + 27281.

It is an arithmetic number, because the mean of its divisors is an integer number (1808895).

Almost surely, 2^30790865 is an apocalyptic number.

30790865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30790865 is a deficient number, since it is larger than the sum of its proper divisors (12622615).

30790865 is a wasteful number, since it uses less digits than its factorization.

30790865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 30790865 is about 5548.9517027994. The cubic root of 30790865 is about 313.4300484854.

The spelling of 30790865 in words is "thirty million, seven hundred ninety thousand, eight hundred sixty-five".