72723180 has 24 divisors (see below), whose sum is σ = 203625072. Its totient is φ = 19392832.

The previous prime is 72723173. The next prime is 72723187. The reversal of 72723180 is 8132727.

It is an interprime number because it is at equal distance from previous prime (72723173) and next prime (72723187).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (72723187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605967 + ... + 606086.

It is an arithmetic number, because the mean of its divisors is an integer number (8484378).

Almost surely, 2^72723180 is an apocalyptic number.

It is an amenable number.

72723180 is an abundant number, since it is smaller than the sum of its proper divisors (130901892).

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

72723180 is a wasteful number, since it uses less digits than its factorization.

72723180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212065 (or 1212063 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 72723180 is about 8527.7886934422. The cubic root of 72723180 is about 417.4049743692.

The spelling of 72723180 in words is "seventy-two million, seven hundred twenty-three thousand, one hundred eighty".