30499188 has 12 divisors (see below), whose sum is σ = 71164800. Its totient is φ = 10166392.

The previous prime is 30499141. The next prime is 30499229. The reversal of 30499188 is 88199403.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270788 + ... + 1270811.

It is an arithmetic number, because the mean of its divisors is an integer number (5930400).

Almost surely, 2^30499188 is an apocalyptic number.

It is an amenable number.

30499188 is an abundant number, since it is smaller than the sum of its proper divisors (40665612).

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

30499188 is a wasteful number, since it uses less digits than its factorization.

30499188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541606 (or 2541604 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 30499188 is about 5522.6069930785. The cubic root of 30499188 is about 312.4372157602.

The spelling of 30499188 in words is "thirty million, four hundred ninety-nine thousand, one hundred eighty-eight".