72623172 has 24 divisors (see below), whose sum is σ = 170791936. Its totient is φ = 24016608.

The previous prime is 72623171. The next prime is 72623189. The reversal of 72623172 is 27132627.

It is a super-2 number, since 2×72623172² = 10548250222683168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72623171) 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, 22303 + ... + 25350.

Almost surely, 2^72623172 is an apocalyptic number.

It is an amenable number.

72623172 is an abundant number, since it is smaller than the sum of its proper divisors (98168764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72623172 is a wasteful number, since it uses less digits than its factorization.

72623172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47787 (or 47785 counting only the distinct ones).

The product of its digits is 7056, while the sum is 30.

The square root of 72623172 is about 8521.9230224169. The cubic root of 72623172 is about 417.2135499087.

Adding to 72623172 its reverse (27132627), we get a palindrome (99755799).

The spelling of 72623172 in words is "seventy-two million, six hundred twenty-three thousand, one hundred seventy-two".