180023985 has 16 divisors (see below), whose sum is σ = 320042880. Its totient is φ = 96012720.

The previous prime is 180023971. The next prime is 180024023. The reversal of 180023985 is 589320081.

It is not a de Polignac number, because 180023985 - 2⁵ = 180023953 is a prime.

It is a Curzon number.

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, 666621 + ... + 666890.

It is an arithmetic number, because the mean of its divisors is an integer number (20002680).

Almost surely, 2^180023985 is an apocalyptic number.

180023985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

180023985 is a deficient number, since it is larger than the sum of its proper divisors (140018895).

180023985 is a wasteful number, since it uses less digits than its factorization.

180023985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333525 (or 1333519 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 180023985 is about 13417.3017033977. The cubic root of 180023985 is about 564.6466948250.

The spelling of 180023985 in words is "one hundred eighty million, twenty-three thousand, nine hundred eighty-five".