72316440 has 96 divisors (see below), whose sum is σ = 268613280. Its totient is φ = 16528896.

The previous prime is 72316429. The next prime is 72316457. The reversal of 72316440 is 4461327.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11829 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (2798055).

Almost surely, 2^72316440 is an apocalyptic number.

72316440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72316440 is an abundant number, since it is smaller than the sum of its proper divisors (196296840).

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

72316440 is a wasteful number, since it uses less digits than its factorization.

72316440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28721 (or 28714 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 72316440 is about 8503.9073372186. The cubic root of 72316440 is about 416.6253384787.

Adding to 72316440 its reverse (4461327), we get a palindrome (76777767).

The spelling of 72316440 in words is "seventy-two million, three hundred sixteen thousand, four hundred forty".