180642840 has 64 divisors (see below), whose sum is σ = 619349760. Its totient is φ = 41289600.

The previous prime is 180642811. The next prime is 180642853. The reversal of 180642840 is 48246081.

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, 106686 + ... + 108365.

It is an arithmetic number, because the mean of its divisors is an integer number (9677340).

Almost surely, 2^180642840 is an apocalyptic number.

180642840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180642840 is an abundant number, since it is smaller than the sum of its proper divisors (438706920).

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

180642840 is a wasteful number, since it uses less digits than its factorization.

180642840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215072 (or 215068 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 180642840 is about 13440.3437456041. The cubic root of 180642840 is about 565.2929694220.

The spelling of 180642840 in words is "one hundred eighty million, six hundred forty-two thousand, eight hundred forty".