72243224 has 16 divisors (see below), whose sum is σ = 135735000. Its totient is φ = 36047232.

The previous prime is 72243221. The next prime is 72243233. The reversal of 72243224 is 42234227.

It is a junction number, because it is equal to n+sod(n) for n = 72243193 and 72243202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72243221) 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, 5057 + ... + 13040.

Almost surely, 2^72243224 is an apocalyptic number.

It is an amenable number.

72243224 is a deficient number, since it is larger than the sum of its proper divisors (63491776).

72243224 is a wasteful number, since it uses less digits than its factorization.

72243224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18602 (or 18598 counting only the distinct ones).

The product of its digits is 5376, while the sum is 26.

The square root of 72243224 is about 8499.6014024188. The cubic root of 72243224 is about 416.4846883907.

The spelling of 72243224 in words is "seventy-two million, two hundred forty-three thousand, two hundred twenty-four".