28134388788 has 48 divisors (see below), whose sum is σ = 71646059520. Its totient is φ = 8521852000.

The previous prime is 28134388783. The next prime is 28134388801. The reversal of 28134388788 is 88788343182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28134388783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265003 + ... + 355661.

It is an arithmetic number, because the mean of its divisors is an integer number (1492626240).

Almost surely, 2^28134388788 is an apocalyptic number.

It is an amenable number.

28134388788 is an abundant number, since it is smaller than the sum of its proper divisors (43511670732).

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

28134388788 is a wasteful number, since it uses less digits than its factorization.

28134388788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93028 (or 93026 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 60.

The spelling of 28134388788 in words is "twenty-eight billion, one hundred thirty-four million, three hundred eighty-eight thousand, seven hundred eighty-eight".