28095931 has 4 divisors (see below), whose sum is σ = 28298200. Its totient is φ = 27893664.

The previous prime is 28095923. The next prime is 28095959. The reversal of 28095931 is 13959082.

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 28095931 - 2³ = 28095923 is a prime.

It is a super-2 number, since 2×28095931² = 1578762677513522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28095911) 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, 100926 + ... + 101203.

It is an arithmetic number, because the mean of its divisors is an integer number (7074550).

Almost surely, 2^28095931 is an apocalyptic number.

28095931 is a deficient number, since it is larger than the sum of its proper divisors (202269).

28095931 is a wasteful number, since it uses less digits than its factorization.

28095931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202268.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 28095931 is about 5300.5594987699. The cubic root of 28095931 is about 304.0052911995.

The spelling of 28095931 in words is "twenty-eight million, ninety-five thousand, nine hundred thirty-one".