180055990 has 16 divisors (see below), whose sum is σ = 324703152. Its totient is φ = 71888544.

The previous prime is 180055987. The next prime is 180055991. The reversal of 180055990 is 99550081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180055991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10989 + ... + 21928.

It is an arithmetic number, because the mean of its divisors is an integer number (20293947).

Almost surely, 2^180055990 is an apocalyptic number.

180055990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180055990 is a deficient number, since it is larger than the sum of its proper divisors (144647162).

180055990 is a wasteful number, since it uses less digits than its factorization.

180055990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33471.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 180055990 is about 13418.4943268610. The cubic root of 180055990 is about 564.6801541566.

The spelling of 180055990 in words is "one hundred eighty million, fifty-five thousand, nine hundred ninety".