69225728 has 144 divisors (see below), whose sum is σ = 170322432. Its totient is φ = 27648000.

The previous prime is 69225719. The next prime is 69225733. The reversal of 69225728 is 82752296.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1134818 + ... + 1134878.

Almost surely, 2^69225728 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 69225728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85161216).

69225728 is an abundant number, since it is smaller than the sum of its proper divisors (101096704).

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

69225728 is a wasteful number, since it uses less digits than its factorization.

69225728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 118 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 69225728 is about 8320.1999975962. The cubic root of 69225728 is about 410.6033709910.

The spelling of 69225728 in words is "sixty-nine million, two hundred twenty-five thousand, seven hundred twenty-eight".