28331992 has 16 divisors (see below), whose sum is σ = 57209040. Its totient is φ = 13076256.

The previous prime is 28331987. The next prime is 28332001. The reversal of 28331992 is 29913382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136108 + ... + 136315.

It is an arithmetic number, because the mean of its divisors is an integer number (3575565).

Almost surely, 2^28331992 is an apocalyptic number.

It is an amenable number.

28331992 is an abundant number, since it is smaller than the sum of its proper divisors (28877048).

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

28331992 is a wasteful number, since it uses less digits than its factorization.

28331992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272442 (or 272438 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 28331992 is about 5322.7804764052. The cubic root of 28331992 is about 304.8543315863.

The spelling of 28331992 in words is "twenty-eight million, three hundred thirty-one thousand, nine hundred ninety-two".