30621980 has 24 divisors (see below), whose sum is σ = 65123520. Its totient is φ = 12093120.

The previous prime is 30621973. The next prime is 30622013. The reversal of 30621980 is 8912603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8111 + ... + 11270.

It is an arithmetic number, because the mean of its divisors is an integer number (2713480).

Almost surely, 2^30621980 is an apocalyptic number.

It is an amenable number.

30621980 is an abundant number, since it is smaller than the sum of its proper divisors (34501540).

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

30621980 is a wasteful number, since it uses less digits than its factorization.

30621980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19469 (or 19467 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 30621980 is about 5533.7130391808. The cubic root of 30621980 is about 312.8559527984.

The spelling of 30621980 in words is "thirty million, six hundred twenty-one thousand, nine hundred eighty".