28101232 has 40 divisors (see below), whose sum is σ = 57183840. Its totient is φ = 13359360.

The previous prime is 28101223. The next prime is 28101259. The reversal of 28101232 is 23210182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32518 + ... + 33370.

It is an arithmetic number, because the mean of its divisors is an integer number (1429596).

Almost surely, 2^28101232 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 28101232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28591920).

28101232 is an abundant number, since it is smaller than the sum of its proper divisors (29082608).

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

28101232 is a wasteful number, since it uses less digits than its factorization.

28101232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28101232 is about 5301.0595167381. The cubic root of 28101232 is about 304.0244093974.

The spelling of 28101232 in words is "twenty-eight million, one hundred one thousand, two hundred thirty-two".