180944820 has 96 divisors (see below), whose sum is σ = 643372800. Its totient is φ = 41357952.

The previous prime is 180944807. The next prime is 180944831. The reversal of 180944820 is 28449081.

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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20155 + ... + 27714.

It is an arithmetic number, because the mean of its divisors is an integer number (6701800).

Almost surely, 2^180944820 is an apocalyptic number.

180944820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180944820 is an abundant number, since it is smaller than the sum of its proper divisors (462427980).

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

180944820 is a wasteful number, since it uses less digits than its factorization.

180944820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47894 (or 47886 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 180944820 is about 13451.5731422016. The cubic root of 180944820 is about 565.6077934796.

The spelling of 180944820 in words is "one hundred eighty million, nine hundred forty-four thousand, eight hundred twenty".