30940686 has 24 divisors (see below), whose sum is σ = 76615344. Its totient is φ = 8840160.

The previous prime is 30940661. The next prime is 30940703. The reversal of 30940686 is 68604903.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30940686.

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, 122655 + ... + 122906.

It is an arithmetic number, because the mean of its divisors is an integer number (3192306).

Almost surely, 2^30940686 is an apocalyptic number.

30940686 is an abundant number, since it is smaller than the sum of its proper divisors (45674658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30940686 is a wasteful number, since it uses less digits than its factorization.

30940686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245576 (or 245573 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 30940686 is about 5562.4352580502. The cubic root of 30940686 is about 313.9375847923.

It can be divided in two parts, 30940 and 686, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 30940686 in words is "thirty million, nine hundred forty thousand, six hundred eighty-six".