72326489 has 4 divisors (see below), whose sum is σ = 72343680. Its totient is φ = 72309300.

The previous prime is 72326477. The next prime is 72326519. The reversal of 72326489 is 98462327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72326489 is a prime.

It is a super-2 number, since 2×72326489² = 10462242022134242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72326459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2432 + ... + 12270.

It is an arithmetic number, because the mean of its divisors is an integer number (18085920).

Almost surely, 2^72326489 is an apocalyptic number.

It is an amenable number.

72326489 is a deficient number, since it is larger than the sum of its proper divisors (17191).

72326489 is an equidigital number, since it uses as much as digits as its factorization.

72326489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17190.

The product of its digits is 145152, while the sum is 41.

The square root of 72326489 is about 8504.4981627372. The cubic root of 72326489 is about 416.6446354929.

The spelling of 72326489 in words is "seventy-two million, three hundred twenty-six thousand, four hundred eighty-nine".