28113532 has 12 divisors (see below), whose sum is σ = 50127336. Its totient is φ = 13791440.

The previous prime is 28113523. The next prime is 28113539. The reversal of 28113532 is 23531182.

It is a junction number, because it is equal to n+sod(n) for n = 28113497 and 28113506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66094 + ... + 66517.

It is an arithmetic number, because the mean of its divisors is an integer number (4177278).

Almost surely, 2^28113532 is an apocalyptic number.

It is an amenable number.

28113532 is a deficient number, since it is larger than the sum of its proper divisors (22013804).

28113532 is a wasteful number, since it uses less digits than its factorization.

28113532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132668 (or 132666 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 28113532 is about 5302.2195352513. The cubic root of 28113532 is about 304.0687604157.

The spelling of 28113532 in words is "twenty-eight million, one hundred thirteen thousand, five hundred thirty-two".