72289292 has 6 divisors (see below), whose sum is σ = 126506268. Its totient is φ = 36144644.

The previous prime is 72289291. The next prime is 72289309. The reversal of 72289292 is 29298227.

It is a happy number.

It is a super-2 number, since 2×72289292² = 10451483475722528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72289291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9036158 + ... + 9036165.

It is an arithmetic number, because the mean of its divisors is an integer number (21084378).

Almost surely, 2^72289292 is an apocalyptic number.

It is an amenable number.

72289292 is a deficient number, since it is larger than the sum of its proper divisors (54216976).

72289292 is a wasteful number, since it uses less digits than its factorization.

72289292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18072327 (or 18072325 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 72289292 is about 8502.3109799630. The cubic root of 72289292 is about 416.5731974518.

The spelling of 72289292 in words is "seventy-two million, two hundred eighty-nine thousand, two hundred ninety-two".