30861897 has 32 divisors (see below), whose sum is σ = 46379520. Its totient is φ = 18246800.

The previous prime is 30861893. The next prime is 30861899. The reversal of 30861897 is 79816803.

It is not a de Polignac number, because 30861897 - 2² = 30861893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30861893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235522 + ... + 235652.

It is an arithmetic number, because the mean of its divisors is an integer number (1449360).

Almost surely, 2^30861897 is an apocalyptic number.

It is an amenable number.

30861897 is a deficient number, since it is larger than the sum of its proper divisors (15517623).

30861897 is a wasteful number, since it uses less digits than its factorization.

30861897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 30861897 is about 5555.3485039194. The cubic root of 30861897 is about 313.6708825233.

The spelling of 30861897 in words is "thirty million, eight hundred sixty-one thousand, eight hundred ninety-seven".