28190927 has 4 divisors (see below), whose sum is σ = 29674680. Its totient is φ = 26707176.

The previous prime is 28190923. The next prime is 28190941. The reversal of 28190927 is 72909182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28190927 - 2² = 28190923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28190923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741848 + ... + 741885.

It is an arithmetic number, because the mean of its divisors is an integer number (7418670).

Almost surely, 2^28190927 is an apocalyptic number.

28190927 is a deficient number, since it is larger than the sum of its proper divisors (1483753).

28190927 is a wasteful number, since it uses less digits than its factorization.

28190927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483752.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 28190927 is about 5309.5128778448. The cubic root of 28190927 is about 304.3475329216.

The spelling of 28190927 in words is "twenty-eight million, one hundred ninety thousand, nine hundred twenty-seven".