30491994 has 24 divisors (see below), whose sum is σ = 66038112. Its totient is φ = 9381840.

The previous prime is 30491969. The next prime is 30492041. The reversal of 30491994 is 49919403.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 14022 + ... + 16049.

It is an arithmetic number, because the mean of its divisors is an integer number (2751588).

Almost surely, 2^30491994 is an apocalyptic number.

30491994 is an abundant number, since it is smaller than the sum of its proper divisors (35546118).

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

30491994 is a wasteful number, since it uses less digits than its factorization.

30491994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30102 (or 30089 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 30491994 is about 5521.9556318391. The cubic root of 30491994 is about 312.4126484387.

It can be divided in two parts, 3049 and 1994, that multiplied together give a palindrome (6079706).

The spelling of 30491994 in words is "thirty million, four hundred ninety-one thousand, nine hundred ninety-four".