180720924 has 48 divisors (see below), whose sum is σ = 437445120. Its totient is φ = 58000320.

The previous prime is 180720923. The next prime is 180720949. The reversal of 180720924 is 429027081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180720923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219177 + ... + 219999.

It is an arithmetic number, because the mean of its divisors is an integer number (9113440).

Almost surely, 2^180720924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180720924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218722560).

180720924 is an abundant number, since it is smaller than the sum of its proper divisors (256724196).

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

180720924 is a wasteful number, since it uses less digits than its factorization.

180720924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 180720924 is about 13443.2482681828. The cubic root of 180720924 is about 565.3744081655.

The spelling of 180720924 in words is "one hundred eighty million, seven hundred twenty thousand, nine hundred twenty-four".