28678677 has 24 divisors (see below), whose sum is σ = 42364224. Its totient is φ = 17195904.

The previous prime is 28678667. The next prime is 28678681. The reversal of 28678677 is 77687682.

It is not a de Polignac number, because 28678677 - 2⁸ = 28678421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678667) 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 23 ways as a sum of consecutive naturals, for example, 26448 + ... + 27510.

It is an arithmetic number, because the mean of its divisors is an integer number (1765176).

Almost surely, 2^28678677 is an apocalyptic number.

It is an amenable number.

28678677 is a deficient number, since it is larger than the sum of its proper divisors (13685547).

28678677 is a wasteful number, since it uses less digits than its factorization.

28678677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1106 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 28678677 is about 5355.2476133228. The cubic root of 28678677 is about 306.0927460333.

The spelling of 28678677 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred seventy-seven".