28938642837 has 48 divisors (see below), whose sum is σ = 43609503168. Its totient is φ = 17045583360.

The previous prime is 28938642833. The next prime is 28938642959. The reversal of 28938642837 is 73824683982.

It is not a de Polignac number, because 28938642837 - 2² = 28938642833 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28938642833) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1088578 + ... + 1114844.

It is an arithmetic number, because the mean of its divisors is an integer number (908531316).

Almost surely, 2^28938642837 is an apocalyptic number.

It is an amenable number.

28938642837 is a deficient number, since it is larger than the sum of its proper divisors (14670860331).

28938642837 is a wasteful number, since it uses less digits than its factorization.

28938642837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26390 (or 26377 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 60.

The spelling of 28938642837 in words is "twenty-eight billion, nine hundred thirty-eight million, six hundred forty-two thousand, eight hundred thirty-seven".