28143532 has 12 divisors (see below), whose sum is σ = 50582560. Its totient is φ = 13691376.

The previous prime is 28143527. The next prime is 28143547. The reversal of 28143532 is 23534182.

It is a self number, because there is not a number n which added to its sum of digits gives 28143532.

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, 94932 + ... + 95227.

Almost surely, 2^28143532 is an apocalyptic number.

It is an amenable number.

28143532 is a deficient number, since it is larger than the sum of its proper divisors (22439028).

28143532 is a wasteful number, since it uses less digits than its factorization.

28143532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190200 (or 190198 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 28143532 is about 5305.0477848932. The cubic root of 28143532 is about 304.1768794052.

The spelling of 28143532 in words is "twenty-eight million, one hundred forty-three thousand, five hundred thirty-two".