180393994 has 16 divisors (see below), whose sum is σ = 298059840. Its totient is φ = 81200160.

The previous prime is 180393977. The next prime is 180394003. The reversal of 180393994 is 499393081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37539 + ... + 42070.

It is an arithmetic number, because the mean of its divisors is an integer number (18628740).

Almost surely, 2^180393994 is an apocalyptic number.

180393994 is a deficient number, since it is larger than the sum of its proper divisors (117665846).

180393994 is a wasteful number, since it uses less digits than its factorization.

180393994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79725.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 180393994 is about 13431.0831283259. The cubic root of 180393994 is about 565.0332755091.

The spelling of 180393994 in words is "one hundred eighty million, three hundred ninety-three thousand, nine hundred ninety-four".