28253831 has 2 divisors, whose sum is σ = 28253832. Its totient is φ = 28253830.

The previous prime is 28253807. The next prime is 28253857. The reversal of 28253831 is 13835282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28253831 - 2²² = 24059527 is a prime.

It is a super-2 number, since 2×28253831² = 1596557932353122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1756247 and since 28253831 and 1756247 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28253891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126915 + 14126916.

It is an arithmetic number, because the mean of its divisors is an integer number (14126916).

Almost surely, 2^28253831 is an apocalyptic number.

28253831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28253831 is an equidigital number, since it uses as much as digits as its factorization.

28253831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 28253831 is about 5315.4332843146. The cubic root of 28253831 is about 304.5737340123.

The spelling of 28253831 in words is "twenty-eight million, two hundred fifty-three thousand, eight hundred thirty-one".