28688682 has 32 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 8315120.

The previous prime is 28688677. The next prime is 28688687.

28688682 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (28688677) and next prime (28688687).

It is not an unprimeable number, because it can be changed into a prime (28688687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7932 + ... + 10967.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^28688682 is an apocalyptic number.

28688682 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28688682 is an abundant number, since it is smaller than the sum of its proper divisors (36629718).

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

28688682 is a wasteful number, since it uses less digits than its factorization.

28688682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18938.

The product of its digits is 589824, while the sum is 48.

The square root of 28688682 is about 5356.1816623412. The cubic root of 28688682 is about 306.1283369576.

The spelling of 28688682 in words is "twenty-eight million, six hundred eighty-eight thousand, six hundred eighty-two".