72224120 has 16 divisors (see below), whose sum is σ = 162504360. Its totient is φ = 28889632.

The previous prime is 72224059. The next prime is 72224137. The reversal of 72224120 is 2142227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 72224092 and 72224101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902762 + ... + 902841.

Almost surely, 2^72224120 is an apocalyptic number.

It is an amenable number.

72224120 is an abundant number, since it is smaller than the sum of its proper divisors (90280240).

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

72224120 is a wasteful number, since it uses less digits than its factorization.

72224120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805614 (or 1805610 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 72224120 is about 8498.4775107074. The cubic root of 72224120 is about 416.4479734137.

Adding to 72224120 its reverse (2142227), we get a palindrome (74366347).

It can be divided in two parts, 722 and 24120, that added together give a palindrome (24842).

The spelling of 72224120 in words is "seventy-two million, two hundred twenty-four thousand, one hundred twenty".