28190436139 has 4 divisors (see below), whose sum is σ = 28405630440. Its totient is φ = 27975241840.

The previous prime is 28190436119. The next prime is 28190436163. The reversal of 28190436139 is 93163409182.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28190436139 - 2⁵ = 28190436107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28190436119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107596954 + ... + 107597215.

It is an arithmetic number, because the mean of its divisors is an integer number (7101407610).

Almost surely, 2^28190436139 is an apocalyptic number.

28190436139 is a deficient number, since it is larger than the sum of its proper divisors (215194301).

28190436139 is a wasteful number, since it uses less digits than its factorization.

28190436139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215194300.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 28190436139 in words is "twenty-eight billion, one hundred ninety million, four hundred thirty-six thousand, one hundred thirty-nine".