28249858 has 16 divisors (see below), whose sum is σ = 52153920. Its totient is φ = 11175696.

The previous prime is 28249843. The next prime is 28249877. The reversal of 28249858 is 85894282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77428 + ... + 77791.

It is an arithmetic number, because the mean of its divisors is an integer number (3259620).

Almost surely, 2^28249858 is an apocalyptic number.

28249858 is a deficient number, since it is larger than the sum of its proper divisors (23904062).

28249858 is a wasteful number, since it uses less digits than its factorization.

28249858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155241.

The product of its digits is 368640, while the sum is 46.

The square root of 28249858 is about 5315.0595481142. The cubic root of 28249858 is about 304.5594571500.

The spelling of 28249858 in words is "twenty-eight million, two hundred forty-nine thousand, eight hundred fifty-eight".