28136132 has 24 divisors (see below), whose sum is σ = 50944320. Its totient is φ = 13586400.

The previous prime is 28136123. The next prime is 28136137. The reversal of 28136132 is 23163182.

It is not an unprimeable number, because it can be changed into a prime (28136137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21719 + ... + 22977.

It is an arithmetic number, because the mean of its divisors is an integer number (2122680).

Almost surely, 2^28136132 is an apocalyptic number.

It is an amenable number.

28136132 is a deficient number, since it is larger than the sum of its proper divisors (22808188).

28136132 is a wasteful number, since it uses less digits than its factorization.

28136132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1449 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 28136132 is about 5304.3502900921. The cubic root of 28136132 is about 304.1502171959.

The spelling of 28136132 in words is "twenty-eight million, one hundred thirty-six thousand, one hundred thirty-two".