28238898870 has 192 divisors, whose sum is σ = 91639102464. Its totient is φ = 5874059520.

The previous prime is 28238898859. The next prime is 28238898887. The reversal of 28238898870 is 7889883282.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 28238898798 and 28238898807.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 557209 + ... + 605771.

It is an arithmetic number, because the mean of its divisors is an integer number (477286992).

Almost surely, 2^28238898870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28238898870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45819551232).

28238898870 is an abundant number, since it is smaller than the sum of its proper divisors (63400203594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28238898870 is a wasteful number, since it uses less digits than its factorization.

28238898870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48667 (or 48664 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 63.

The spelling of 28238898870 in words is "twenty-eight billion, two hundred thirty-eight million, eight hundred ninety-eight thousand, eight hundred seventy".