72722289 has 8 divisors (see below), whose sum is σ = 97175232. Its totient is φ = 48375440.

The previous prime is 72722263. The next prime is 72722327. The reversal of 72722289 is 98222727.

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 72722289 - 2⁸ = 72722033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72722219) 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, 24909 + ... + 27674.

It is an arithmetic number, because the mean of its divisors is an integer number (12146904).

Almost surely, 2^72722289 is an apocalyptic number.

It is an amenable number.

72722289 is a deficient number, since it is larger than the sum of its proper divisors (24452943).

72722289 is a wasteful number, since it uses less digits than its factorization.

72722289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53047.

The product of its digits is 56448, while the sum is 39.

The square root of 72722289 is about 8527.7364523067. The cubic root of 72722289 is about 417.4032696888.

The spelling of 72722289 in words is "seventy-two million, seven hundred twenty-two thousand, two hundred eighty-nine".