28313992 has 16 divisors (see below), whose sum is σ = 60672960. Its totient is φ = 12134544.

The previous prime is 28313983. The next prime is 28314001. The reversal of 28313992 is 29931382.

It is an interprime number because it is at equal distance from previous prime (28313983) and next prime (28314001).

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, 252748 + ... + 252859.

It is an arithmetic number, because the mean of its divisors is an integer number (3792060).

Almost surely, 2^28313992 is an apocalyptic number.

It is an amenable number.

28313992 is an abundant number, since it is smaller than the sum of its proper divisors (32358968).

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

28313992 is a wasteful number, since it uses less digits than its factorization.

28313992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505620 (or 505616 counting only the distinct ones).

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

The square root of 28313992 is about 5321.0893621513. The cubic root of 28313992 is about 304.7897574650.

The spelling of 28313992 in words is "twenty-eight million, three hundred thirteen thousand, nine hundred ninety-two".