28768782 has 40 divisors (see below), whose sum is σ = 67156776. Its totient is φ = 8215536.

The previous prime is 28768687. The next prime is 28768799. The reversal of 28768782 is 28786782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13408 + ... + 15404.

Almost surely, 2^28768782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28768782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33578388).

28768782 is an abundant number, since it is smaller than the sum of its proper divisors (38387994).

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

28768782 is an equidigital number, since it uses as much as digits as its factorization.

28768782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030 (or 2009 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 28768782 is about 5363.6537919594. The cubic root of 28768782 is about 306.4129799167.

The spelling of 28768782 in words is "twenty-eight million, seven hundred sixty-eight thousand, seven hundred eighty-two".