72655228 has 6 divisors (see below), whose sum is σ = 127146656. Its totient is φ = 36327612.

The previous prime is 72655217. The next prime is 72655243. The reversal of 72655228 is 82255627.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9081900 + ... + 9081907.

Almost surely, 2^72655228 is an apocalyptic number.

It is an amenable number.

72655228 is a deficient number, since it is larger than the sum of its proper divisors (54491428).

72655228 is a wasteful number, since it uses less digits than its factorization.

72655228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18163811 (or 18163809 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 72655228 is about 8523.8036110647. The cubic root of 72655228 is about 417.2749271517.

The spelling of 72655228 in words is "seventy-two million, six hundred fifty-five thousand, two hundred twenty-eight".