28223932 has 12 divisors (see below), whose sum is σ = 53882136. Its totient is φ = 12829040.

The previous prime is 28223929. The next prime is 28223941. The reversal of 28223932 is 23932282.

It is a junction number, because it is equal to n+sod(n) for n = 28223894 and 28223903.

It is a congruent number.

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, 320683 + ... + 320770.

It is an arithmetic number, because the mean of its divisors is an integer number (4490178).

Almost surely, 2^28223932 is an apocalyptic number.

28223932 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28223932 is a deficient number, since it is larger than the sum of its proper divisors (25658204).

28223932 is a wasteful number, since it uses less digits than its factorization.

28223932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641468 (or 641466 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 28223932 is about 5312.6200692314. The cubic root of 28223932 is about 304.4662599239.

The spelling of 28223932 in words is "twenty-eight million, two hundred twenty-three thousand, nine hundred thirty-two".