28742388888 has 16 divisors (see below), whose sum is σ = 71855972280. Its totient is φ = 9580796288.

The previous prime is 28742388881. The next prime is 28742388889. The reversal of 28742388888 is 88888324782.

It is a super-2 number, since 2×28742388888² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28742388881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598799745 + ... + 598799792.

Almost surely, 2^28742388888 is an apocalyptic number.

It is an amenable number.

28742388888 is an abundant number, since it is smaller than the sum of its proper divisors (43113583392).

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

28742388888 is a wasteful number, since it uses less digits than its factorization.

28742388888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197599546 (or 1197599542 counting only the distinct ones).

The product of its digits is 88080384, while the sum is 66.

The spelling of 28742388888 in words is "twenty-eight billion, seven hundred forty-two million, three hundred eighty-eight thousand, eight hundred eighty-eight".