72622431 has 24 divisors (see below), whose sum is σ = 125099520. Its totient is φ = 39693456.

The previous prime is 72622423. The next prime is 72622441. The reversal of 72622431 is 13422627.

72622431 is a `hidden beast` number, since 7 + 2 + 622 + 4 + 31 = 666.

It is not a de Polignac number, because 72622431 - 2³ = 72622423 is a prime.

It is a super-2 number, since 2×72622431² = 10548034968699522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72622395 and 72622404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72622441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23611 + ... + 26508.

It is an arithmetic number, because the mean of its divisors is an integer number (5212480).

Almost surely, 2^72622431 is an apocalyptic number.

72622431 is a deficient number, since it is larger than the sum of its proper divisors (52477089).

72622431 is a wasteful number, since it uses less digits than its factorization.

72622431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50155 (or 50152 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 72622431 is about 8521.8795462034. The cubic root of 72622431 is about 417.2121309112.

The spelling of 72622431 in words is "seventy-two million, six hundred twenty-two thousand, four hundred thirty-one".