72843424 has 12 divisors (see below), whose sum is σ = 143410554. Its totient is φ = 36421696.

The previous prime is 72843413. The next prime is 72843437. The reversal of 72843424 is 42434827.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 48400 = 8532^2 + 220^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 72843424.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1138147 + ... + 1138210.

Almost surely, 2^72843424 is an apocalyptic number.

It is an amenable number.

72843424 is a deficient number, since it is larger than the sum of its proper divisors (70567130).

72843424 is a wasteful number, since it uses less digits than its factorization.

72843424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276367 (or 2276359 counting only the distinct ones).

The product of its digits is 43008, while the sum is 34.

The square root of 72843424 is about 8534.8359093775. The cubic root of 72843424 is about 417.6349001723.

The spelling of 72843424 in words is "seventy-two million, eight hundred forty-three thousand, four hundred twenty-four".