136028889 has 20 divisors (see below), whose sum is σ = 203737380. Its totient is φ = 90447840.

The previous prime is 136028887. The next prime is 136028891. The reversal of 136028889 is 988820631.

136028889 is a `hidden beast` number, since 1 + 360 + 288 + 8 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (136028887) and next prime (136028891).

It can be written as a sum of positive squares in 2 ways, for example, as 21902400 + 114126489 = 4680^2 + 10683^2 .

It is not a de Polignac number, because 136028889 - 2¹ = 136028887 is a prime.

It is a super-4 number, since 4×136028889⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (136028881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32107 + ... + 36095.

It is an arithmetic number, because the mean of its divisors is an integer number (10186869).

Almost surely, 2^136028889 is an apocalyptic number.

It is an amenable number.

136028889 is a deficient number, since it is larger than the sum of its proper divisors (67708491).

136028889 is an equidigital number, since it uses as much as digits as its factorization.

136028889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 136028889 is about 11663.1423295783. The cubic root of 136028889 is about 514.2927281782.

The spelling of 136028889 in words is "one hundred thirty-six million, twenty-eight thousand, eight hundred eighty-nine".