72207028 has 12 divisors (see below), whose sum is σ = 131856480. Its totient is φ = 34533752.

The previous prime is 72206999. The next prime is 72207077. The reversal of 72207028 is 82070227.

It is a junction number, because it is equal to n+sod(n) for n = 72206987 and 72207005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392338 + ... + 392521.

It is an arithmetic number, because the mean of its divisors is an integer number (10988040).

Almost surely, 2^72207028 is an apocalyptic number.

It is an amenable number.

72207028 is a deficient number, since it is larger than the sum of its proper divisors (59649452).

72207028 is a wasteful number, since it uses less digits than its factorization.

72207028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784886 (or 784884 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 72207028 is about 8497.4718593238. The cubic root of 72207028 is about 416.4151197062.

The spelling of 72207028 in words is "seventy-two million, two hundred seven thousand, twenty-eight".