30961814 has 24 divisors (see below), whose sum is σ = 51386400. Its totient is φ = 13978848.

The previous prime is 30961787. The next prime is 30961817. The reversal of 30961814 is 41816903.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30961817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14912 + ... + 16860.

It is an arithmetic number, because the mean of its divisors is an integer number (2141100).

Almost surely, 2^30961814 is an apocalyptic number.

30961814 is a deficient number, since it is larger than the sum of its proper divisors (20424586).

30961814 is a wasteful number, since it uses less digits than its factorization.

30961814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2011 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 30961814 is about 5564.3341021186. The cubic root of 30961814 is about 314.0090264759.

The spelling of 30961814 in words is "thirty million, nine hundred sixty-one thousand, eight hundred fourteen".