180868440 has 64 divisors (see below), whose sum is σ = 574529760. Its totient is φ = 45393920.

The previous prime is 180868433. The next prime is 180868459. The reversal of 180868440 is 44868081.

It is a congruent 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, 42291 + ... + 46370.

Almost surely, 2^180868440 is an apocalyptic number.

180868440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180868440 is an abundant number, since it is smaller than the sum of its proper divisors (393661320).

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

180868440 is a wasteful number, since it uses less digits than its factorization.

180868440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88692 (or 88688 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 180868440 is about 13448.7337693926. The cubic root of 180868440 is about 565.5281979371.

The spelling of 180868440 in words is "one hundred eighty million, eight hundred sixty-eight thousand, four hundred forty".