28678607 has 4 divisors (see below), whose sum is σ = 28703136. Its totient is φ = 28654080.

The previous prime is 28678597. The next prime is 28678633. The reversal of 28678607 is 70687682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28678607 - 2⁴ = 28678591 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10418 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (7175784).

Almost surely, 2^28678607 is an apocalyptic number.

28678607 is a deficient number, since it is larger than the sum of its proper divisors (24529).

28678607 is a wasteful number, since it uses less digits than its factorization.

28678607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24528.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 28678607 is about 5355.2410776733. The cubic root of 28678607 is about 306.0924969922.

The spelling of 28678607 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred seven".