72375220 has 12 divisors (see below), whose sum is σ = 151988004. Its totient is φ = 28950080.

The previous prime is 72375197. The next prime is 72375229. The reversal of 72375220 is 2257327.

It can be written as a sum of positive squares in 2 ways, for example, as 49392784 + 22982436 = 7028^2 + 4794^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72375229) 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, 1809361 + ... + 1809400.

It is an arithmetic number, because the mean of its divisors is an integer number (12665667).

Almost surely, 2^72375220 is an apocalyptic number.

It is an amenable number.

72375220 is an abundant number, since it is smaller than the sum of its proper divisors (79612784).

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

72375220 is a wasteful number, since it uses less digits than its factorization.

72375220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618770 (or 3618768 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 72375220 is about 8507.3626935731. The cubic root of 72375220 is about 416.7381879004.

The spelling of 72375220 in words is "seventy-two million, three hundred seventy-five thousand, two hundred twenty".