180899394 has 32 divisors (see below), whose sum is σ = 390386304. Its totient is φ = 55553280.

The previous prime is 180899377. The next prime is 180899417. The reversal of 180899394 is 493998081.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 44299 + ... + 48209.

It is an arithmetic number, because the mean of its divisors is an integer number (12199572).

Almost surely, 2^180899394 is an apocalyptic number.

180899394 is an abundant number, since it is smaller than the sum of its proper divisors (209486910).

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

180899394 is a wasteful number, since it uses less digits than its factorization.

180899394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 180899394 is about 13449.8845348204. The cubic root of 180899394 is about 565.5604577780.

The spelling of 180899394 in words is "one hundred eighty million, eight hundred ninety-nine thousand, three hundred ninety-four".