28137638943 has 18 divisors (see below), whose sum is σ = 41526434664. Its totient is φ = 18359297544.

The previous prime is 28137638941. The next prime is 28137638951. The reversal of 28137638943 is 34983673182.

It is not a de Polignac number, because 28137638943 - 2¹ = 28137638941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28137638943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28137638941) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 687771 + ... + 727532.

It is an arithmetic number, because the mean of its divisors is an integer number (2307024148).

Almost surely, 2^28137638943 is an apocalyptic number.

28137638943 is a deficient number, since it is larger than the sum of its proper divisors (13388795721).

28137638943 is a wasteful number, since it uses less digits than its factorization.

28137638943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415403 (or 1415353 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 28137638943 in words is "twenty-eight billion, one hundred thirty-seven million, six hundred thirty-eight thousand, nine hundred forty-three".