72247924 has 24 divisors (see below), whose sum is σ = 144708480. Its totient is φ = 30917856.

The previous prime is 72247921. The next prime is 72247927. The reversal of 72247924 is 42974227.

It is an interprime number because it is at equal distance from previous prime (72247921) and next prime (72247927).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72247921) 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 7 ways as a sum of consecutive naturals, for example, 23382 + ... + 26290.

It is an arithmetic number, because the mean of its divisors is an integer number (6029520).

Almost surely, 2^72247924 is an apocalyptic number.

It is an amenable number.

72247924 is an abundant number, since it is smaller than the sum of its proper divisors (72460556).

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

72247924 is a wasteful number, since it uses less digits than its factorization.

72247924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807 (or 3805 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 72247924 is about 8499.8778814757. The cubic root of 72247924 is about 416.4937200825.

The spelling of 72247924 in words is "seventy-two million, two hundred forty-seven thousand, nine hundred twenty-four".