72722287 has 8 divisors (see below), whose sum is σ = 79822080. Its totient is φ = 65703960.

The previous prime is 72722263. The next prime is 72722327. The reversal of 72722287 is 78222727.

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 72722287 - 2¹⁹ = 72197999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72722087) 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, 18487 + ... + 22072.

It is an arithmetic number, because the mean of its divisors is an integer number (9977760).

Almost surely, 2^72722287 is an apocalyptic number.

72722287 is a deficient number, since it is larger than the sum of its proper divisors (7099793).

72722287 is a wasteful number, since it uses less digits than its factorization.

72722287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40733.

The product of its digits is 43904, while the sum is 37.

The square root of 72722287 is about 8527.7363350423. The cubic root of 72722287 is about 417.4032658623.

It can be divided in two parts, 7272 and 2287, that added together give a palindrome (9559).

The spelling of 72722287 in words is "seventy-two million, seven hundred twenty-two thousand, two hundred eighty-seven".