28231932 has 12 divisors (see below), whose sum is σ = 65874536. Its totient is φ = 9410640.

The previous prime is 28231927. The next prime is 28231933. The reversal of 28231932 is 23913282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28231932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176319 + ... + 1176342.

Almost surely, 2^28231932 is an apocalyptic number.

It is an amenable number.

28231932 is an abundant number, since it is smaller than the sum of its proper divisors (37642604).

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

28231932 is a wasteful number, since it uses less digits than its factorization.

28231932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352668 (or 2352666 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 28231932 is about 5313.3729400448. The cubic root of 28231932 is about 304.4950239291.

The spelling of 28231932 in words is "twenty-eight million, two hundred thirty-one thousand, nine hundred thirty-two".