30980556 has 36 divisors (see below), whose sum is σ = 81214952. Its totient is φ = 10326528.

The previous prime is 30980549. The next prime is 30980557. The reversal of 30980556 is 65508903.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30980556.

It is not an unprimeable number, because it can be changed into a prime (30980557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14965 + ... + 16908.

Almost surely, 2^30980556 is an apocalyptic number.

30980556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30980556 is an abundant number, since it is smaller than the sum of its proper divisors (50234396).

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

30980556 is a wasteful number, since it uses less digits than its factorization.

30980556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31892 (or 31878 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 30980556 is about 5566.0179661945. The cubic root of 30980556 is about 314.0723730022.

The spelling of 30980556 in words is "thirty million, nine hundred eighty thousand, five hundred fifty-six".