72989272 has 8 divisors (see below), whose sum is σ = 136854900. Its totient is φ = 36494632.

The previous prime is 72989251. The next prime is 72989303. The reversal of 72989272 is 27298927.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

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 as a sum of consecutive naturals, namely, 4561822 + ... + 4561837.

Almost surely, 2^72989272 is an apocalyptic number.

It is an amenable number.

72989272 is a deficient number, since it is larger than the sum of its proper divisors (63865628).

72989272 is a wasteful number, since it uses less digits than its factorization.

72989272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9123665 (or 9123661 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 72989272 is about 8543.3759135368. The cubic root of 72989272 is about 417.9134455982.

The spelling of 72989272 in words is "seventy-two million, nine hundred eighty-nine thousand, two hundred seventy-two".