72230240 has 24 divisors (see below), whose sum is σ = 170644320. Its totient is φ = 28892032.

The previous prime is 72230231. The next prime is 72230269. The reversal of 72230240 is 4203227.

It is a happy number.

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

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, 225560 + ... + 225879.

It is an arithmetic number, because the mean of its divisors is an integer number (7110180).

Almost surely, 2^72230240 is an apocalyptic number.

It is an amenable number.

72230240 is an abundant number, since it is smaller than the sum of its proper divisors (98414080).

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

72230240 is a wasteful number, since it uses less digits than its factorization.

72230240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451454 (or 451446 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 72230240 is about 8498.8375675736. The cubic root of 72230240 is about 416.4597358259.

Adding to 72230240 its reverse (4203227), we get a palindrome (76433467).

The spelling of 72230240 in words is "seventy-two million, two hundred thirty thousand, two hundred forty".