28338883881 has 48 divisors (see below), whose sum is σ = 48023114688. Its totient is φ = 14699059200.

The previous prime is 28338883831. The next prime is 28338883883. The reversal of 28338883881 is 18838883382.

It is not a de Polignac number, because 28338883881 - 2¹⁰ = 28338882857 is a prime.

It is a super-2 number, since 2×28338883881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28338883883) 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, 1075221 + ... + 1101261.

It is an arithmetic number, because the mean of its divisors is an integer number (1000481556).

Almost surely, 2^28338883881 is an apocalyptic number.

28338883881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28338883881 is a deficient number, since it is larger than the sum of its proper divisors (19684230807).

28338883881 is a wasteful number, since it uses less digits than its factorization.

28338883881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26742 (or 26735 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 60.

It can be divided in two parts, 28338 and 883881, that added together give a palindrome (912219).

The spelling of 28338883881 in words is "twenty-eight billion, three hundred thirty-eight million, eight hundred eighty-three thousand, eight hundred eighty-one".