72118424 has 16 divisors (see below), whose sum is σ = 154539600. Its totient is φ = 30907872.

The previous prime is 72118367. The next prime is 72118427. The reversal of 72118424 is 42481127.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72118427) 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, 643859 + ... + 643970.

It is an arithmetic number, because the mean of its divisors is an integer number (9658725).

Almost surely, 2^72118424 is an apocalyptic number.

It is an amenable number.

72118424 is an abundant number, since it is smaller than the sum of its proper divisors (82421176).

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

72118424 is a wasteful number, since it uses less digits than its factorization.

72118424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287842 (or 1287838 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 72118424 is about 8492.2567083196. The cubic root of 72118424 is about 416.2447247180.

The spelling of 72118424 in words is "seventy-two million, one hundred eighteen thousand, four hundred twenty-four".