72290322 has 24 divisors (see below), whose sum is σ = 168677964. Its totient is φ = 22243104.

The previous prime is 72290321. The next prime is 72290329. The reversal of 72290322 is 22309227.

It can be written as a sum of positive squares in 2 ways, for example, as 58384881 + 13905441 = 7641^2 + 3729^2 .

It is a super-3 number, since 3×72290322³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72290321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154233 + ... + 154700.

Almost surely, 2^72290322 is an apocalyptic number.

72290322 is an abundant number, since it is smaller than the sum of its proper divisors (96387642).

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

72290322 is a wasteful number, since it uses less digits than its factorization.

72290322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308954 (or 308951 counting only the distinct ones).

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

The square root of 72290322 is about 8502.3715515143. The cubic root of 72290322 is about 416.5751759299.

Adding to 72290322 its reverse (22309227), we get a palindrome (94599549).

It can be divided in two parts, 72 and 290322, that multiplied together give a square (20903184 = 4572²).

The spelling of 72290322 in words is "seventy-two million, two hundred ninety thousand, three hundred twenty-two".