28011634289 has 16 divisors (see below), whose sum is σ = 30172082688. Its totient is φ = 25937093952.

The previous prime is 28011634249. The next prime is 28011634291. The reversal of 28011634289 is 98243611082.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28011634289 - 2¹² = 28011630193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28011634229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84104 + ... + 251190.

It is an arithmetic number, because the mean of its divisors is an integer number (1885755168).

Almost surely, 2^28011634289 is an apocalyptic number.

It is an amenable number.

28011634289 is a deficient number, since it is larger than the sum of its proper divisors (2160448399).

28011634289 is a wasteful number, since it uses less digits than its factorization.

28011634289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167344.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 28011634289 in words is "twenty-eight billion, eleven million, six hundred thirty-four thousand, two hundred eighty-nine".