28127232 has 156 divisors (see below), whose sum is σ = 93705040. Its totient is φ = 7962624.

The previous prime is 28127221. The next prime is 28127249. The reversal of 28127232 is 23272182.

It is a happy number.

It is a super-2 number, since 2×28127232² = 1582282359963648, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28127196 and 28127205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257994 + ... + 258102.

Almost surely, 2^28127232 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 28127232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46852520).

28127232 is an abundant number, since it is smaller than the sum of its proper divisors (65577808).

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

28127232 is a wasteful number, since it uses less digits than its factorization.

28127232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 121 counting only the distinct ones).

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

The square root of 28127232 is about 5303.5112897023. The cubic root of 28127232 is about 304.1181442917.

It can be divided in two parts, 28 and 127232, that added together give a triangular number (127260 = T₅₀₄).

The spelling of 28127232 in words is "twenty-eight million, one hundred twenty-seven thousand, two hundred thirty-two".