28361819 has 2 divisors, whose sum is σ = 28361820. Its totient is φ = 28361818.

The previous prime is 28361717. The next prime is 28361833. The reversal of 28361819 is 91816382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28361819 - 2⁸ = 28361563 is a prime.

It is a super-2 number, since 2×28361819² = 1608785553977522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28361849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14180909 + 14180910.

It is an arithmetic number, because the mean of its divisors is an integer number (14180910).

Almost surely, 2^28361819 is an apocalyptic number.

28361819 is a deficient number, since it is larger than the sum of its proper divisors (1).

28361819 is an equidigital number, since it uses as much as digits as its factorization.

28361819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 28361819 is about 5325.5815644866. The cubic root of 28361819 is about 304.9612743092.

The spelling of 28361819 in words is "twenty-eight million, three hundred sixty-one thousand, eight hundred nineteen".