30904080 has 40 divisors (see below), whose sum is σ = 95803392. Its totient is φ = 8241024.

The previous prime is 30904073. The next prime is 30904087. The reversal of 30904080 is 8040903.

It is an interprime number because it is at equal distance from previous prime (30904073) and next prime (30904087).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 30904080.

It is not an unprimeable number, because it can be changed into a prime (30904087) 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, 64144 + ... + 64623.

Almost surely, 2^30904080 is an apocalyptic number.

30904080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30904080 is an abundant number, since it is smaller than the sum of its proper divisors (64899312).

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

30904080 is a wasteful number, since it uses less digits than its factorization.

30904080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128783 (or 128777 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 30904080 is about 5559.1438189707. The cubic root of 30904080 is about 313.8137291643.

Adding to 30904080 its reverse (8040903), we get a palindrome (38944983).

The spelling of 30904080 in words is "thirty million, nine hundred four thousand, eighty".