28768826 has 4 divisors (see below), whose sum is σ = 43153242. Its totient is φ = 14384412.

The previous prime is 28768823. The next prime is 28768829. The reversal of 28768826 is 62886782.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28768823) and next prime (28768829).

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 7155625 = 4649^2 + 2675^2 .

It is not an unprimeable number, because it can be changed into a prime (28768823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7192205 + ... + 7192208.

Almost surely, 2^28768826 is an apocalyptic number.

28768826 is a deficient number, since it is larger than the sum of its proper divisors (14384416).

28768826 is a wasteful number, since it uses less digits than its factorization.

28768826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14384415.

The product of its digits is 516096, while the sum is 47.

The square root of 28768826 is about 5363.6578936394. The cubic root of 28768826 is about 306.4131361296.

The spelling of 28768826 in words is "twenty-eight million, seven hundred sixty-eight thousand, eight hundred twenty-six".