28776888 has 48 divisors (see below), whose sum is σ = 89072880. Its totient is φ = 8221824.

The previous prime is 28776863. The next prime is 28776911. The reversal of 28776888 is 88867782.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28045 + ... + 29052.

It is an arithmetic number, because the mean of its divisors is an integer number (1855685).

Almost surely, 2^28776888 is an apocalyptic number.

28776888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28776888 is an abundant number, since it is smaller than the sum of its proper divisors (60295992).

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

28776888 is a wasteful number, since it uses less digits than its factorization.

28776888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57116 (or 57109 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 28776888 is about 5364.4093803512. The cubic root of 28776888 is about 306.4417559047.

The spelling of 28776888 in words is "twenty-eight million, seven hundred seventy-six thousand, eight hundred eighty-eight".