180872020 has 96 divisors (see below), whose sum is σ = 462309120. Its totient is φ = 58060800.

The previous prime is 180871979. The next prime is 180872053. The reversal of 180872020 is 20278081.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 180872020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257670 + ... + 258370.

It is an arithmetic number, because the mean of its divisors is an integer number (4815720).

Almost surely, 2^180872020 is an apocalyptic number.

180872020 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 180872020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231154560).

180872020 is an abundant number, since it is smaller than the sum of its proper divisors (281437100).

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

180872020 is a wasteful number, since it uses less digits than its factorization.

180872020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 180872020 is about 13448.8668667661. The cubic root of 180872020 is about 565.5319291530.

The spelling of 180872020 in words is "one hundred eighty million, eight hundred seventy-two thousand, twenty".