28321892 has 12 divisors (see below), whose sum is σ = 49787136. Its totient is φ = 14097000.

The previous prime is 28321877. The next prime is 28321903. The reversal of 28321892 is 29812382.

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, 14984 + ... + 16767.

It is an arithmetic number, because the mean of its divisors is an integer number (4148928).

Almost surely, 2^28321892 is an apocalyptic number.

It is an amenable number.

28321892 is a deficient number, since it is larger than the sum of its proper divisors (21465244).

28321892 is a wasteful number, since it uses less digits than its factorization.

28321892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31978 (or 31976 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 28321892 is about 5321.8316395767. The cubic root of 28321892 is about 304.8181016982.

The spelling of 28321892 in words is "twenty-eight million, three hundred twenty-one thousand, eight hundred ninety-two".