180977994 has 12 divisors (see below), whose sum is σ = 392119026. Its totient is φ = 60325992.

The previous prime is 180977939. The next prime is 180978011. The reversal of 180977994 is 499779081.

It can be written as a sum of positive squares in only one way, i.e., 145515969 + 35462025 = 12063^2 + 5955^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 180977994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5027149 + ... + 5027184.

Almost surely, 2^180977994 is an apocalyptic number.

180977994 is an abundant number, since it is smaller than the sum of its proper divisors (211141032).

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

180977994 is a wasteful number, since it uses less digits than its factorization.

180977994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054341 (or 10054338 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 180977994 is about 13452.8061756646. The cubic root of 180977994 is about 565.6423571040.

The spelling of 180977994 in words is "one hundred eighty million, nine hundred seventy-seven thousand, nine hundred ninety-four".