72455272 has 8 divisors (see below), whose sum is σ = 135853650. Its totient is φ = 36227632.

The previous prime is 72455269. The next prime is 72455291. The reversal of 72455272 is 27255427.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50608996 + 21846276 = 7114^2 + 4674^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4528447 + ... + 4528462.

Almost surely, 2^72455272 is an apocalyptic number.

It is an amenable number.

72455272 is a deficient number, since it is larger than the sum of its proper divisors (63398378).

72455272 is a wasteful number, since it uses less digits than its factorization.

72455272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9056915 (or 9056911 counting only the distinct ones).

The product of its digits is 39200, while the sum is 34.

The square root of 72455272 is about 8512.0662591406. The cubic root of 72455272 is about 416.8917783752.

It can be divided in two parts, 72455 and 272, that added together give a palindrome (72727).

The spelling of 72455272 in words is "seventy-two million, four hundred fifty-five thousand, two hundred seventy-two".