72231408 has 120 divisors (see below), whose sum is σ = 213905952. Its totient is φ = 22708224.

The previous prime is 72231403. The next prime is 72231413. The reversal of 72231408 is 80413227.

It is an interprime number because it is at equal distance from previous prime (72231403) and next prime (72231413).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72231403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374160 + ... + 374352.

Almost surely, 2^72231408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72231408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106952976).

72231408 is an abundant number, since it is smaller than the sum of its proper divisors (141674544).

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

72231408 is a wasteful number, since it uses less digits than its factorization.

72231408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 72231408 is about 8498.9062825754. The cubic root of 72231408 is about 416.4619806029.

The spelling of 72231408 in words is "seventy-two million, two hundred thirty-one thousand, four hundred eight".