72997532 has 12 divisors (see below), whose sum is σ = 127883280. Its totient is φ = 36459456.

The previous prime is 72997517. The next prime is 72997543. The reversal of 72997532 is 23579927.

It is a happy number.

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, 5432 + ... + 13247.

It is an arithmetic number, because the mean of its divisors is an integer number (10656940).

Almost surely, 2^72997532 is an apocalyptic number.

It is an amenable number.

72997532 is a deficient number, since it is larger than the sum of its proper divisors (54885748).

72997532 is a wasteful number, since it uses less digits than its factorization.

72997532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19660 (or 19658 counting only the distinct ones).

The product of its digits is 238140, while the sum is 44.

The square root of 72997532 is about 8543.8593153212. The cubic root of 72997532 is about 417.9292097179.

The spelling of 72997532 in words is "seventy-two million, nine hundred ninety-seven thousand, five hundred thirty-two".