28538992 has 20 divisors (see below), whose sum is σ = 55380136. Its totient is φ = 14247360.

The previous prime is 28538977. The next prime is 28538999. The reversal of 28538992 is 29983582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28538999) by changing a digit.

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, 15463 + ... + 17209.

Almost surely, 2^28538992 is an apocalyptic number.

It is an amenable number.

28538992 is a deficient number, since it is larger than the sum of its proper divisors (26841144).

28538992 is a wasteful number, since it uses less digits than its factorization.

28538992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776 (or 2770 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 28538992 is about 5342.1898131759. The cubic root of 28538992 is about 305.5949758409.

The spelling of 28538992 in words is "twenty-eight million, five hundred thirty-eight thousand, nine hundred ninety-two".