28127132 has 12 divisors (see below), whose sum is σ = 53697336. Its totient is φ = 12785040.

The previous prime is 28127111. The next prime is 28127159. The reversal of 28127132 is 23172182.

It is a super-2 number, since 2×28127132² = 1582271109090848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319583 + ... + 319670.

It is an arithmetic number, because the mean of its divisors is an integer number (4474778).

Almost surely, 2^28127132 is an apocalyptic number.

28127132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28127132 is a deficient number, since it is larger than the sum of its proper divisors (25570204).

28127132 is a wasteful number, since it uses less digits than its factorization.

28127132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639268 (or 639266 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 28127132 is about 5303.5018619776. The cubic root of 28127132 is about 304.1177838836.

The spelling of 28127132 in words is "twenty-eight million, one hundred twenty-seven thousand, one hundred thirty-two".