72323240 has 32 divisors (see below), whose sum is σ = 177521760. Its totient is φ = 26299200.

The previous prime is 72323213. The next prime is 72323249. The reversal of 72323240 is 4232327.

It is not an unprimeable number, because it can be changed into a prime (72323249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81746 + ... + 82625.

It is an arithmetic number, because the mean of its divisors is an integer number (5547555).

Almost surely, 2^72323240 is an apocalyptic number.

It is an amenable number.

72323240 is an abundant number, since it is smaller than the sum of its proper divisors (105198520).

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

72323240 is a wasteful number, since it uses less digits than its factorization.

72323240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164393 (or 164389 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 72323240 is about 8504.3071440300. The cubic root of 72323240 is about 416.6383966598.

Adding to 72323240 its reverse (4232327), we get a palindrome (76555567).

The spelling of 72323240 in words is "seventy-two million, three hundred twenty-three thousand, two hundred forty".