72469172 has 6 divisors (see below), whose sum is σ = 126821058. Its totient is φ = 36234584.

The previous prime is 72469171. The next prime is 72469207. The reversal of 72469172 is 27196427.

It can be written as a sum of positive squares in only one way, i.e., 72012196 + 456976 = 8486^2 + 676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72469171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058643 + ... + 9058650.

It is an arithmetic number, because the mean of its divisors is an integer number (21136843).

Almost surely, 2^72469172 is an apocalyptic number.

It is an amenable number.

72469172 is a deficient number, since it is larger than the sum of its proper divisors (54351886).

72469172 is a wasteful number, since it uses less digits than its factorization.

72469172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18117297 (or 18117295 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 72469172 is about 8512.8827079903. The cubic root of 72469172 is about 416.9184358566.

It can be divided in two parts, 724 and 69172, that added together give a palindrome (69896).

The spelling of 72469172 in words is "seventy-two million, four hundred sixty-nine thousand, one hundred seventy-two".