30889620 has 48 divisors (see below), whose sum is σ = 96102720. Its totient is φ = 8237088.

The previous prime is 30889583. The next prime is 30889631. The reversal of 30889620 is 2698803.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28062 + ... + 29141.

It is an arithmetic number, because the mean of its divisors is an integer number (2002140).

Almost surely, 2^30889620 is an apocalyptic number.

30889620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30889620 is an abundant number, since it is smaller than the sum of its proper divisors (65213100).

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

30889620 is a wasteful number, since it uses less digits than its factorization.

30889620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57221 (or 57213 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 30889620 is about 5557.8431068176. The cubic root of 30889620 is about 313.7647771118.

The spelling of 30889620 in words is "thirty million, eight hundred eighty-nine thousand, six hundred twenty".