180442899 has 48 divisors (see below), whose sum is σ = 326918592. Its totient is φ = 93360384.

The previous prime is 180442897. The next prime is 180442907. The reversal of 180442899 is 998244081.

It is not a de Polignac number, because 180442899 - 2¹ = 180442897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180442897) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 41329 + ... + 45485.

It is an arithmetic number, because the mean of its divisors is an integer number (6810804).

Almost surely, 2^180442899 is an apocalyptic number.

180442899 is a deficient number, since it is larger than the sum of its proper divisors (146475693).

180442899 is a wasteful number, since it uses less digits than its factorization.

180442899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 180442899 is about 13432.9035952768. The cubic root of 180442899 is about 565.0843312658.

The spelling of 180442899 in words is "one hundred eighty million, four hundred forty-two thousand, eight hundred ninety-nine".