72245660 has 12 divisors (see below), whose sum is σ = 151715928. Its totient is φ = 28898256.

The previous prime is 72245647. The next prime is 72245669. The reversal of 72245660 is 6654227.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72245669) 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, 1806122 + ... + 1806161.

It is an arithmetic number, because the mean of its divisors is an integer number (12642994).

Almost surely, 2^72245660 is an apocalyptic number.

It is an amenable number.

72245660 is an abundant number, since it is smaller than the sum of its proper divisors (79470268).

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

72245660 is a wasteful number, since it uses less digits than its factorization.

72245660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612292 (or 3612290 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 72245660 is about 8499.7447020484. The cubic root of 72245660 is about 416.4893695462.

Adding to 72245660 its reverse (6654227), we get a palindrome (78899887).

The spelling of 72245660 in words is "seventy-two million, two hundred forty-five thousand, six hundred sixty".