72384731 has 8 divisors (see below), whose sum is σ = 72923760. Its totient is φ = 71848288.

The previous prime is 72384709. The next prime is 72384743. The reversal of 72384731 is 13748327.

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 72384731 - 2²² = 68190427 is a prime.

It is a super-2 number, since 2×72384731² = 10479098563884722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72384691 and 72384700.

It is not an unprimeable number, because it can be changed into a prime (72384761) 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, 123020 + ... + 123606.

It is an arithmetic number, because the mean of its divisors is an integer number (9115470).

Almost surely, 2^72384731 is an apocalyptic number.

72384731 is a deficient number, since it is larger than the sum of its proper divisors (539029).

72384731 is a wasteful number, since it uses less digits than its factorization.

72384731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293.

The product of its digits is 28224, while the sum is 35.

The square root of 72384731 is about 8507.9216616046. The cubic root of 72384731 is about 416.7564419533.

The spelling of 72384731 in words is "seventy-two million, three hundred eighty-four thousand, seven hundred thirty-one".