28888888 has 16 divisors (see below), whose sum is σ = 61904880. Its totient is φ = 12380928.

The previous prime is 28888883. The next prime is 28888889. The reversal of 28888888 is 88888882.

It is a nude number because it is divisible by every one of its digits.

28888888 is a modest number, since divided by 8888 gives 2888 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28888883) 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, 257881 + ... + 257992.

It is an arithmetic number, because the mean of its divisors is an integer number (3869055).

Almost surely, 2^28888888 is an apocalyptic number.

28888888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28888888 is an abundant number, since it is smaller than the sum of its proper divisors (33015992).

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

28888888 is a wasteful number, since it uses less digits than its factorization.

28888888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515886 (or 515882 counting only the distinct ones).

The product of its digits is 4194304, while the sum is 58.

The square root of 28888888 is about 5374.8384161759. The cubic root of 28888888 is about 306.8387996035.

The spelling of 28888888 in words is "twenty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-eight".