28671132 has 24 divisors (see below), whose sum is σ = 76456576. Its totient is φ = 8191728.

The previous prime is 28671131. The next prime is 28671143. The reversal of 28671132 is 23117682.

It is a super-2 number, since 2×28671132² = 1644067620322848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28671132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28671131) 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, 170578 + ... + 170745.

Almost surely, 2^28671132 is an apocalyptic number.

It is an amenable number.

28671132 is an abundant number, since it is smaller than the sum of its proper divisors (47785444).

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

28671132 is a wasteful number, since it uses less digits than its factorization.

28671132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341337 (or 341335 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 28671132 is about 5354.5431177646. The cubic root of 28671132 is about 306.0659006256.

The spelling of 28671132 in words is "twenty-eight million, six hundred seventy-one thousand, one hundred thirty-two".