28145879 has 2 divisors, whose sum is σ = 28145880. Its totient is φ = 28145878.

The previous prime is 28145849. The next prime is 28145893. The reversal of 28145879 is 97854182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28145879 - 2¹⁶ = 28080343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28145839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14072939 + 14072940.

It is an arithmetic number, because the mean of its divisors is an integer number (14072940).

Almost surely, 2^28145879 is an apocalyptic number.

28145879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28145879 is an equidigital number, since it uses as much as digits as its factorization.

28145879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 28145879 is about 5305.2689846981. The cubic root of 28145879 is about 304.1853346729.

The spelling of 28145879 in words is "twenty-eight million, one hundred forty-five thousand, eight hundred seventy-nine".