28146132 has 72 divisors (see below), whose sum is σ = 82689152. Its totient is φ = 7905600.

The previous prime is 28146119. The next prime is 28146179. The reversal of 28146132 is 23164182.

It is a super-2 number, since 2×28146132² = 1584409493122848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28146096 and 28146105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14457 + ... + 16287.

Almost surely, 2^28146132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28146132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41344576).

28146132 is an abundant number, since it is smaller than the sum of its proper divisors (54543020).

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

28146132 is a wasteful number, since it uses less digits than its factorization.

28146132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1904 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 28146132 is about 5305.2928288644. The cubic root of 28146132 is about 304.1862460989.

The spelling of 28146132 in words is "twenty-eight million, one hundred forty-six thousand, one hundred thirty-two".