72051628 has 18 divisors (see below), whose sum is σ = 138596108. Its totient is φ = 32750520.

The previous prime is 72051619. The next prime is 72051643. The reversal of 72051628 is 82615027.

It is a self number, because there is not a number n which added to its sum of digits gives 72051628.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73950 + ... + 74917.

Almost surely, 2^72051628 is an apocalyptic number.

It is an amenable number.

72051628 is a deficient number, since it is larger than the sum of its proper divisors (66544480).

72051628 is a wasteful number, since it uses less digits than its factorization.

72051628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148893 (or 148880 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 72051628 is about 8488.3230381507. The cubic root of 72051628 is about 416.1161765636.

The spelling of 72051628 in words is "seventy-two million, fifty-one thousand, six hundred twenty-eight".