180940280 has 64 divisors (see below), whose sum is σ = 424353600. Its totient is φ = 69350400.

The previous prime is 180940247. The next prime is 180940283. The reversal of 180940280 is 82049081.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180940283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174644 + ... + 175676.

It is an arithmetic number, because the mean of its divisors is an integer number (6630525).

Almost surely, 2^180940280 is an apocalyptic number.

180940280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180940280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212176800).

180940280 is an abundant number, since it is smaller than the sum of its proper divisors (243413320).

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

180940280 is a wasteful number, since it uses less digits than its factorization.

180940280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 180940280 is about 13451.4043876467. The cubic root of 180940280 is about 565.6030629751.

The spelling of 180940280 in words is "one hundred eighty million, nine hundred forty thousand, two hundred eighty".