30491766 has 12 divisors (see below), whose sum is σ = 66065532. Its totient is φ = 10163916.

The previous prime is 30491759. The next prime is 30491771. The reversal of 30491766 is 66719403.

It is a self number, because there is not a number n which added to its sum of digits gives 30491766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 846976 + ... + 847011.

It is an arithmetic number, because the mean of its divisors is an integer number (5505461).

Almost surely, 2^30491766 is an apocalyptic number.

30491766 is an abundant number, since it is smaller than the sum of its proper divisors (35573766).

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

30491766 is a wasteful number, since it uses less digits than its factorization.

30491766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693995 (or 1693992 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 30491766 is about 5521.9349869407. The cubic root of 30491766 is about 312.4118697615.

The spelling of 30491766 in words is "thirty million, four hundred ninety-one thousand, seven hundred sixty-six".