180930920 has 64 divisors (see below), whose sum is σ = 430444800. Its totient is φ = 68256000.

The previous prime is 180930833. The next prime is 180930961. The reversal of 180930920 is 29039081.

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, 240545 + ... + 241295.

It is an arithmetic number, because the mean of its divisors is an integer number (6725700).

Almost surely, 2^180930920 is an apocalyptic number.

180930920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180930920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215222400).

180930920 is an abundant number, since it is smaller than the sum of its proper divisors (249513880).

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

180930920 is a wasteful number, since it uses less digits than its factorization.

180930920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 180930920 is about 13451.0564640849. The cubic root of 180930920 is about 565.5933099672.

The spelling of 180930920 in words is "one hundred eighty million, nine hundred thirty thousand, nine hundred twenty".