72240628 has 12 divisors (see below), whose sum is σ = 126725760. Its totient is φ = 36033272.

The previous prime is 72240587. The next prime is 72240659. The reversal of 72240628 is 82604227.

It is a self number, because there is not a number n which added to its sum of digits gives 72240628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19876 + ... + 23227.

It is an arithmetic number, because the mean of its divisors is an integer number (10560480).

Almost surely, 2^72240628 is an apocalyptic number.

It is an amenable number.

72240628 is a deficient number, since it is larger than the sum of its proper divisors (54485132).

72240628 is a wasteful number, since it uses less digits than its factorization.

72240628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43526 (or 43524 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 72240628 is about 8499.4486880032. The cubic root of 72240628 is about 416.4796996543.

The spelling of 72240628 in words is "seventy-two million, two hundred forty thousand, six hundred twenty-eight".