72742244 has 12 divisors (see below), whose sum is σ = 131405568. Its totient is φ = 35197800.

The previous prime is 72742217. The next prime is 72742249. The reversal of 72742244 is 44224727.

It is a self number, because there is not a number n which added to its sum of digits gives 72742244.

It is not an unprimeable number, because it can be changed into a prime (72742249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293192 + ... + 293439.

It is an arithmetic number, because the mean of its divisors is an integer number (10950464).

Almost surely, 2^72742244 is an apocalyptic number.

It is an amenable number.

72742244 is a deficient number, since it is larger than the sum of its proper divisors (58663324).

72742244 is a wasteful number, since it uses less digits than its factorization.

72742244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586666 (or 586664 counting only the distinct ones).

The product of its digits is 25088, while the sum is 32.

The square root of 72742244 is about 8528.9063777251. The cubic root of 72742244 is about 417.4414446904.

The spelling of 72742244 in words is "seventy-two million, seven hundred forty-two thousand, two hundred forty-four".