28402837689 has 8 divisors (see below), whose sum is σ = 38349823360. Its totient is φ = 18695538576.

The previous prime is 28402837681. The next prime is 28402837721. The reversal of 28402837689 is 98673820482.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28402837689 - 2³ = 28402837681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28402837681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59921362 + ... + 59921835.

It is an arithmetic number, because the mean of its divisors is an integer number (4793727920).

Almost surely, 2^28402837689 is an apocalyptic number.

It is an amenable number.

28402837689 is a deficient number, since it is larger than the sum of its proper divisors (9946985671).

28402837689 is a wasteful number, since it uses less digits than its factorization.

28402837689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119843279.

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 28402837689 in words is "twenty-eight billion, four hundred two million, eight hundred thirty-seven thousand, six hundred eighty-nine".