28677668 has 12 divisors (see below), whose sum is σ = 50359260. Its totient is φ = 14289312.

The previous prime is 28677653. The next prime is 28677673. The reversal of 28677668 is 86677682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16581184 + 12096484 = 4072^2 + 3478^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11063 + ... + 13406.

It is an arithmetic number, because the mean of its divisors is an integer number (4196605).

Almost surely, 2^28677668 is an apocalyptic number.

It is an amenable number.

28677668 is a deficient number, since it is larger than the sum of its proper divisors (21681592).

28677668 is a wasteful number, since it uses less digits than its factorization.

28677668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24766 (or 24764 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The square root of 28677668 is about 5355.1534058326. The cubic root of 28677668 is about 306.0891562443.

The spelling of 28677668 in words is "twenty-eight million, six hundred seventy-seven thousand, six hundred sixty-eight".