28855403738 has 16 divisors (see below), whose sum is σ = 51172145280. Its totient is φ = 11940166896.

The previous prime is 28855403737. The next prime is 28855403741. The reversal of 28855403738 is 83730455882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28855403738.

It is not an unprimeable number, because it can be changed into a prime (28855403737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35535806 + ... + 35536617.

It is an arithmetic number, because the mean of its divisors is an integer number (3198259080).

Almost surely, 2^28855403738 is an apocalyptic number.

28855403738 is a deficient number, since it is larger than the sum of its proper divisors (22316741542).

28855403738 is a wasteful number, since it uses less digits than its factorization.

28855403738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71072461.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 28855403738 in words is "twenty-eight billion, eight hundred fifty-five million, four hundred three thousand, seven hundred thirty-eight".