28127532 has 18 divisors (see below), whose sum is σ = 65673804. Its totient is φ = 9369720.

The previous prime is 28127531. The next prime is 28127563. The reversal of 28127532 is 23572182.

It is a super-2 number, since 2×28127532² = 1582316112822048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28127532.

It is not an unprimeable number, because it can be changed into a prime (28127531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17607 + ... + 19137.

Almost surely, 2^28127532 is an apocalyptic number.

It is an amenable number.

28127532 is an abundant number, since it is smaller than the sum of its proper divisors (37546272).

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

28127532 is an equidigital number, since it uses as much as digits as its factorization.

28127532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069 (or 1536 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 28127532 is about 5303.5395727759. The cubic root of 28127532 is about 304.1192255110.

The spelling of 28127532 in words is "twenty-eight million, one hundred twenty-seven thousand, five hundred thirty-two".