180789640 has 32 divisors (see below), whose sum is σ = 407364480. Its totient is φ = 72211392.

The previous prime is 180789601. The next prime is 180789641. The reversal of 180789640 is 46987081.

It is not an unprimeable number, because it can be changed into a prime (180789641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28609 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (12730140).

Almost surely, 2^180789640 is an apocalyptic number.

180789640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180789640 is an abundant number, since it is smaller than the sum of its proper divisors (226574840).

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

180789640 is a wasteful number, since it uses less digits than its factorization.

180789640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541 (or 6537 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 180789640 is about 13445.8038063925. The cubic root of 180789640 is about 565.4460570260.

The spelling of 180789640 in words is "one hundred eighty million, seven hundred eighty-nine thousand, six hundred forty".