28873890389 has 16 divisors (see below), whose sum is σ = 31242376704. Its totient is φ = 26626924800.

The previous prime is 28873890361. The next prime is 28873890413. The reversal of 28873890389 is 98309837882.

It is a cyclic number.

It is not a de Polignac number, because 28873890389 - 2³² = 24578923093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28873890359) 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, 209504 + ... + 318809.

It is an arithmetic number, because the mean of its divisors is an integer number (1952648544).

Almost surely, 2^28873890389 is an apocalyptic number.

It is an amenable number.

28873890389 is a deficient number, since it is larger than the sum of its proper divisors (2368486315).

28873890389 is a wasteful number, since it uses less digits than its factorization.

28873890389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528428.

The product of its (nonzero) digits is 41803776, while the sum is 65.

The spelling of 28873890389 in words is "twenty-eight billion, eight hundred seventy-three million, eight hundred ninety thousand, three hundred eighty-nine".