28263557932 has 12 divisors (see below), whose sum is σ = 49462992880. Its totient is φ = 14131274256.

The previous prime is 28263557909. The next prime is 28263557947. The reversal of 28263557932 is 23975536282.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28263557932.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18169 + ... + 238447.

Almost surely, 2^28263557932 is an apocalyptic number.

It is an amenable number.

28263557932 is a deficient number, since it is larger than the sum of its proper divisors (21199434948).

28263557932 is a wasteful number, since it uses less digits than its factorization.

28263557932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252360 (or 252358 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 52.

The spelling of 28263557932 in words is "twenty-eight billion, two hundred sixty-three million, five hundred fifty-seven thousand, nine hundred thirty-two".