72724393 has 8 divisors (see below), whose sum is σ = 83280960. Its totient is φ = 62209680.

The previous prime is 72724387. The next prime is 72724397. The reversal of 72724393 is 39342727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72724393 - 2⁵ = 72724361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72724397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6643 + ... + 13768.

It is an arithmetic number, because the mean of its divisors is an integer number (10410120).

Almost surely, 2^72724393 is an apocalyptic number.

It is an amenable number.

72724393 is a deficient number, since it is larger than the sum of its proper divisors (10556567).

72724393 is a wasteful number, since it uses less digits than its factorization.

72724393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20927.

The product of its digits is 63504, while the sum is 37.

The square root of 72724393 is about 8527.8598135757. The cubic root of 72724393 is about 417.4072950847.

The spelling of 72724393 in words is "seventy-two million, seven hundred twenty-four thousand, three hundred ninety-three".