28276858 has 8 divisors (see below), whose sum is σ = 42852852. Its totient is φ = 13992576.

The previous prime is 28276847. The next prime is 28276861. The reversal of 28276858 is 85867282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26594649 + 1682209 = 5157^2 + 1297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 72685 + ... + 73072.

Almost surely, 2^28276858 is an apocalyptic number.

28276858 is a deficient number, since it is larger than the sum of its proper divisors (14575994).

28276858 is a wasteful number, since it uses less digits than its factorization.

28276858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145856.

The product of its digits is 430080, while the sum is 46.

The square root of 28276858 is about 5317.5988942379. The cubic root of 28276858 is about 304.6564545339.

The spelling of 28276858 in words is "twenty-eight million, two hundred seventy-six thousand, eight hundred fifty-eight".