72232290 has 96 divisors (see below), whose sum is σ = 208707840. Its totient is φ = 17769024.

The previous prime is 72232289. The next prime is 72232333. The reversal of 72232290 is 9223227.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44839 + ... + 46421.

It is an arithmetic number, because the mean of its divisors is an integer number (2174040).

Almost surely, 2^72232290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72232290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104353920).

72232290 is an abundant number, since it is smaller than the sum of its proper divisors (136475550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72232290 is a wasteful number, since it uses less digits than its factorization.

72232290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 72232290 is about 8498.9581714467. The cubic root of 72232290 is about 416.4636757010.

The spelling of 72232290 in words is "seventy-two million, two hundred thirty-two thousand, two hundred ninety".