72807734 has 8 divisors (see below), whose sum is σ = 114959640. Its totient is φ = 34487856.

The previous prime is 72807697. The next prime is 72807751. The reversal of 72807734 is 43770827.

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

It is a super-2 number, since 2×72807734² = 10601932260429512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1915993 = 72807734 / (7 + 2 + 8 + 0 + 7 + 7 + 3 + 4).

It is a Curzon 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, 957959 + ... + 958034.

It is an arithmetic number, because the mean of its divisors is an integer number (14369955).

Almost surely, 2^72807734 is an apocalyptic number.

72807734 is a deficient number, since it is larger than the sum of its proper divisors (42151906).

72807734 is a wasteful number, since it uses less digits than its factorization.

72807734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916014.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 72807734 is about 8532.7448104347. The cubic root of 72807734 is about 417.5666815935.

The spelling of 72807734 in words is "seventy-two million, eight hundred seven thousand, seven hundred thirty-four".