28161392 has 40 divisors (see below), whose sum is σ = 64376832. Its totient is φ = 11678400.

The previous prime is 28161389. The next prime is 28161421. The reversal of 28161392 is 29316182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584 + ... + 7527.

Almost surely, 2^28161392 is an apocalyptic number.

It is an amenable number.

28161392 is an abundant number, since it is smaller than the sum of its proper divisors (36215440).

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

28161392 is a wasteful number, since it uses less digits than its factorization.

28161392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8157 (or 8151 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 28161392 is about 5306.7308203827. The cubic root of 28161392 is about 304.2412097611.

The spelling of 28161392 in words is "twenty-eight million, one hundred sixty-one thousand, three hundred ninety-two".