30808971 has 16 divisors (see below), whose sum is σ = 45981600. Its totient is φ = 20386944.

The previous prime is 30808969. The next prime is 30808979. The reversal of 30808971 is 17980803.

It is not a de Polignac number, because 30808971 - 2¹ = 30808969 is a prime.

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 not an unprimeable number, because it can be changed into a prime (30808979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466 + ... + 7863.

It is an arithmetic number, because the mean of its divisors is an integer number (2873850).

Almost surely, 2^30808971 is an apocalyptic number.

30808971 is a deficient number, since it is larger than the sum of its proper divisors (15172629).

30808971 is a wasteful number, since it uses less digits than its factorization.

30808971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8475 (or 8469 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 30808971 is about 5550.5829423584. The cubic root of 30808971 is about 313.4914720328.

The spelling of 30808971 in words is "thirty million, eight hundred eight thousand, nine hundred seventy-one".