72228292 has 24 divisors (see below), whose sum is σ = 130786880. Its totient is φ = 34875360.

The previous prime is 72228271. The next prime is 72228293. The reversal of 72228292 is 29282227.

It is not an unprimeable number, because it can be changed into a prime (72228293) 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, 18817 + ... + 22327.

Almost surely, 2^72228292 is an apocalyptic number.

It is an amenable number.

72228292 is a deficient number, since it is larger than the sum of its proper divisors (58558588).

72228292 is a wasteful number, since it uses less digits than its factorization.

72228292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691 (or 3689 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 72228292 is about 8498.7229628927. The cubic root of 72228292 is about 416.4559919145.

The spelling of 72228292 in words is "seventy-two million, two hundred twenty-eight thousand, two hundred ninety-two".