28788782 has 8 divisors (see below), whose sum is σ = 47108952. Its totient is φ = 13085800.

The previous prime is 28788763. The next prime is 28788787.

It is a happy number.

28788782 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28788782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28788787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654269 + ... + 654312.

It is an arithmetic number, because the mean of its divisors is an integer number (5888619).

Almost surely, 2^28788782 is an apocalyptic number.

28788782 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28788782 is a deficient number, since it is larger than the sum of its proper divisors (18320170).

28788782 is a wasteful number, since it uses less digits than its factorization.

28788782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308594.

The product of its digits is 802816, while the sum is 50.

The square root of 28788782 is about 5365.5178687616. The cubic root of 28788782 is about 306.4839693667.

The spelling of 28788782 in words is "twenty-eight million, seven hundred eighty-eight thousand, seven hundred eighty-two".