72295881 has 16 divisors (see below), whose sum is σ = 111811584. Its totient is φ = 40694544.

The previous prime is 72295871. The next prime is 72295907. The reversal of 72295881 is 18859227.

It is not a de Polignac number, because 72295881 - 2⁹ = 72295369 is a prime.

It is a super-2 number, since 2×72295881² = 10453388819132322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72295871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24285 + ... + 27098.

It is an arithmetic number, because the mean of its divisors is an integer number (6988224).

Almost surely, 2^72295881 is an apocalyptic number.

It is an amenable number.

72295881 is a deficient number, since it is larger than the sum of its proper divisors (39515703).

72295881 is a wasteful number, since it uses less digits than its factorization.

72295881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51460.

The product of its digits is 80640, while the sum is 42.

The square root of 72295881 is about 8502.6984540203. The cubic root of 72295881 is about 416.5858536250.

The spelling of 72295881 in words is "seventy-two million, two hundred ninety-five thousand, eight hundred eighty-one".