28631142 has 24 divisors (see below), whose sum is σ = 62132616. Its totient is φ = 9528576.

The previous prime is 28631137. The next prime is 28631153. The reversal of 28631142 is 24113682.

28631142 is a `hidden beast` number, since 28 + 631 + 1 + 4 + 2 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21253 + ... + 22559.

It is an arithmetic number, because the mean of its divisors is an integer number (2588859).

Almost surely, 2^28631142 is an apocalyptic number.

28631142 is an abundant number, since it is smaller than the sum of its proper divisors (33501474).

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

28631142 is a wasteful number, since it uses less digits than its factorization.

28631142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532 (or 2529 counting only the distinct ones).

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

The square root of 28631142 is about 5350.8076025961. The cubic root of 28631142 is about 305.9235359375.

It can be divided in two parts, 2863 and 1142, that added together give a triangular number (4005 = T₈₉).

The spelling of 28631142 in words is "twenty-eight million, six hundred thirty-one thousand, one hundred forty-two".