28113719 has 2 divisors, whose sum is σ = 28113720. Its totient is φ = 28113718.

The previous prime is 28113713. The next prime is 28113727. The reversal of 28113719 is 91731182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28113719 - 2²⁴ = 11336503 is a prime.

It is a super-2 number, since 2×28113719² = 1580762392021922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28113713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14056859 + 14056860.

It is an arithmetic number, because the mean of its divisors is an integer number (14056860).

Almost surely, 2^28113719 is an apocalyptic number.

28113719 is a deficient number, since it is larger than the sum of its proper divisors (1).

28113719 is an equidigital number, since it uses as much as digits as its factorization.

28113719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 32.

The square root of 28113719 is about 5302.2371693465. The cubic root of 28113719 is about 304.0694345956.

Adding to 28113719 its sum of digits (32), we get a triangular number (28113751 = T₇₄₉₈).

The spelling of 28113719 in words is "twenty-eight million, one hundred thirteen thousand, seven hundred nineteen".