69728832 has 84 divisors (see below), whose sum is σ = 211651596. Its totient is φ = 21872640.

The previous prime is 69728819. The next prime is 69728839. The reversal of 69728832 is 23882796.

It can be written as a sum of positive squares in 2 ways, for example, as 23270976 + 46457856 = 4824^2 + 6816^2 .

It is a super-2 number, since 2×69728832² = 9724220024168448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69728839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6232 + ... + 13352.

Almost surely, 2^69728832 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 69728832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105825798).

69728832 is an abundant number, since it is smaller than the sum of its proper divisors (141922764).

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

69728832 is a wasteful number, since it uses less digits than its factorization.

69728832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156 (or 7143 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 69728832 is about 8350.3791530684. The cubic root of 69728832 is about 411.5956695592.

The spelling of 69728832 in words is "sixty-nine million, seven hundred twenty-eight thousand, eight hundred thirty-two".