28159519 has 2 divisors, whose sum is σ = 28159520. Its totient is φ = 28159518.

The previous prime is 28159489. The next prime is 28159541. The reversal of 28159519 is 91595182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28159519 - 2¹³ = 28151327 is a prime.

It is a super-2 number, since 2×28159519² = 1585917020622722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28159559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14079759 + 14079760.

It is an arithmetic number, because the mean of its divisors is an integer number (14079760).

Almost surely, 2^28159519 is an apocalyptic number.

28159519 is a deficient number, since it is larger than the sum of its proper divisors (1).

28159519 is an equidigital number, since it uses as much as digits as its factorization.

28159519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 40.

The square root of 28159519 is about 5306.5543434511. The cubic root of 28159519 is about 304.2344646350.

The spelling of 28159519 in words is "twenty-eight million, one hundred fifty-nine thousand, five hundred nineteen".