72520180 has 12 divisors (see below), whose sum is σ = 152292420. Its totient is φ = 29008064.

The previous prime is 72520163. The next prime is 72520187. The reversal of 72520180 is 8102527.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 58186384 = 3786^2 + 7628^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72520187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812985 + ... + 1813024.

It is an arithmetic number, because the mean of its divisors is an integer number (12691035).

Almost surely, 2^72520180 is an apocalyptic number.

It is an amenable number.

72520180 is an abundant number, since it is smaller than the sum of its proper divisors (79772240).

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

72520180 is a wasteful number, since it uses less digits than its factorization.

72520180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626018 (or 3626016 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 72520180 is about 8515.8781109173. The cubic root of 72520180 is about 417.0162300289.

The spelling of 72520180 in words is "seventy-two million, five hundred twenty thousand, one hundred eighty".