72422889 has 64 divisors (see below), whose sum is σ = 131328000. Its totient is φ = 34352640.

The previous prime is 72422887. The next prime is 72422899. The reversal of 72422889 is 98822427.

It is not a de Polignac number, because 72422889 - 2¹ = 72422887 is a prime.

It is a super-2 number, since 2×72422889² = 10490149702212642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72422889.

It is not an unprimeable number, because it can be changed into a prime (72422887) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 126997 + ... + 127565.

It is an arithmetic number, because the mean of its divisors is an integer number (2052000).

Almost surely, 2^72422889 is an apocalyptic number.

It is an amenable number.

72422889 is a deficient number, since it is larger than the sum of its proper divisors (58905111).

72422889 is a wasteful number, since it uses less digits than its factorization.

72422889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its digits is 129024, while the sum is 42.

The square root of 72422889 is about 8510.1638644623. The cubic root of 72422889 is about 416.8296608884.

The spelling of 72422889 in words is "seventy-two million, four hundred twenty-two thousand, eight hundred eighty-nine".