28249586 has 4 divisors (see below), whose sum is σ = 42374382. Its totient is φ = 14124792.

The previous prime is 28249549. The next prime is 28249591. The reversal of 28249586 is 68594282.

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

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 361 = 5315^2 + 19^2 .

It is a super-3 number, since 3×28249586³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7062395 + ... + 7062398.

Almost surely, 2^28249586 is an apocalyptic number.

28249586 is a deficient number, since it is larger than the sum of its proper divisors (14124796).

28249586 is a wasteful number, since it uses less digits than its factorization.

28249586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14124795.

The product of its digits is 276480, while the sum is 44.

The square root of 28249586 is about 5315.0339603807. The cubic root of 28249586 is about 304.5584796768.

The spelling of 28249586 in words is "twenty-eight million, two hundred forty-nine thousand, five hundred eighty-six".