30709980 has 72 divisors (see below), whose sum is σ = 106465632. Its totient is φ = 7019136.

The previous prime is 30709979. The next prime is 30709993. The reversal of 30709980 is 8990703.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10927 + ... + 13446.

Almost surely, 2^30709980 is an apocalyptic number.

30709980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30709980 is an abundant number, since it is smaller than the sum of its proper divisors (75755652).

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

30709980 is a wasteful number, since it uses less digits than its factorization.

30709980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24395 (or 24390 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 30709980 is about 5541.6585964854. The cubic root of 30709980 is about 313.1553563982.

The spelling of 30709980 in words is "thirty million, seven hundred nine thousand, nine hundred eighty".