72740322 has 64 divisors (see below), whose sum is σ = 175718400. Its totient is φ = 22219920.

The previous prime is 72740321. The next prime is 72740347. The reversal of 72740322 is 22304727.

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

It is not an unprimeable number, because it can be changed into a prime (72740321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30663 + ... + 32949.

It is an arithmetic number, because the mean of its divisors is an integer number (2745600).

Almost surely, 2^72740322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72740322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87859200).

72740322 is an abundant number, since it is smaller than the sum of its proper divisors (102978078).

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

72740322 is a wasteful number, since it uses less digits than its factorization.

72740322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 72740322 is about 8528.7937013390. The cubic root of 72740322 is about 417.4377681036.

The spelling of 72740322 in words is "seventy-two million, seven hundred forty thousand, three hundred twenty-two".