30890691 has 24 divisors (see below), whose sum is σ = 48646416. Its totient is φ = 18774720.

The previous prime is 30890681. The next prime is 30890719. The reversal of 30890691 is 19609803.

It is not a de Polignac number, because 30890691 - 2¹⁴ = 30874307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30890681) 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, 8121 + ... + 11301.

It is an arithmetic number, because the mean of its divisors is an integer number (2026934).

Almost surely, 2^30890691 is an apocalyptic number.

30890691 is a deficient number, since it is larger than the sum of its proper divisors (17755725).

30890691 is a wasteful number, since it uses less digits than its factorization.

30890691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 30890691 is about 5557.9394563093. The cubic root of 30890691 is about 313.7684033374.

The spelling of 30890691 in words is "thirty million, eight hundred ninety thousand, six hundred ninety-one".