72322450 has 12 divisors (see below), whose sum is σ = 134519850. Its totient is φ = 28928960.

The previous prime is 72322441. The next prime is 72322451. The reversal of 72322450 is 5422327.

It can be written as a sum of positive squares in 3 ways, for example, as 58476609 + 13845841 = 7647^2 + 3721^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (72322451) 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 5 ways as a sum of consecutive naturals, for example, 723175 + ... + 723274.

Almost surely, 2^72322450 is an apocalyptic number.

72322450 is a deficient number, since it is larger than the sum of its proper divisors (62197400).

72322450 is a wasteful number, since it uses less digits than its factorization.

72322450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446461 (or 1446456 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72322450 is about 8504.2606968507. The cubic root of 72322450 is about 416.6368796484.

Adding to 72322450 its reverse (5422327), we get a palindrome (77744777).

The spelling of 72322450 in words is "seventy-two million, three hundred twenty-two thousand, four hundred fifty".