30790218 has 16 divisors (see below), whose sum is σ = 61670880. Its totient is φ = 10248336.

The previous prime is 30790189. The next prime is 30790219. The reversal of 30790218 is 81209703.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30790219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (3854430).

Almost surely, 2^30790218 is an apocalyptic number.

30790218 is an abundant number, since it is smaller than the sum of its proper divisors (30880662).

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

30790218 is a wasteful number, since it uses less digits than its factorization.

30790218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7541.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 30790218 is about 5548.8934031931. The cubic root of 30790218 is about 313.4278531302.

It can be divided in two parts, 307 and 90218, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 30790218 in words is "thirty million, seven hundred ninety thousand, two hundred eighteen".