30990775 has 12 divisors (see below), whose sum is σ = 40100112. Its totient is φ = 23714240.

The previous prime is 30990769. The next prime is 30990781. The reversal of 30990775 is 57709903.

It is an interprime number because it is at equal distance from previous prime (30990769) and next prime (30990781).

It is not a de Polignac number, because 30990775 - 2⁹ = 30990263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26374 + ... + 27523.

It is an arithmetic number, because the mean of its divisors is an integer number (3341676).

Almost surely, 2^30990775 is an apocalyptic number.

30990775 is a deficient number, since it is larger than the sum of its proper divisors (9109337).

30990775 is a wasteful number, since it uses less digits than its factorization.

30990775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53930 (or 53925 counting only the distinct ones).

The product of its (nonzero) digits is 59535, while the sum is 40.

The square root of 30990775 is about 5566.9358717341. The cubic root of 30990775 is about 314.1069016783.

The spelling of 30990775 in words is "thirty million, nine hundred ninety thousand, seven hundred seventy-five".