28694859 has 4 divisors (see below), whose sum is σ = 38259816. Its totient is φ = 19129904.

The previous prime is 28694849. The next prime is 28694899. The reversal of 28694859 is 95849682.

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 28694859 - 2¹² = 28690763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28694849) 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, 4782474 + ... + 4782479.

It is an arithmetic number, because the mean of its divisors is an integer number (9564954).

Almost surely, 2^28694859 is an apocalyptic number.

28694859 is a deficient number, since it is larger than the sum of its proper divisors (9564957).

28694859 is an equidigital number, since it uses as much as digits as its factorization.

28694859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564956.

The product of its digits is 1244160, while the sum is 51.

The square root of 28694859 is about 5356.7582547657. The cubic root of 28694859 is about 306.1503063535.

The spelling of 28694859 in words is "twenty-eight million, six hundred ninety-four thousand, eight hundred fifty-nine".