28858856 has 32 divisors (see below), whose sum is σ = 59241000. Its totient is φ = 13098240.

The previous prime is 28858807. The next prime is 28858867. The reversal of 28858856 is 65885882.

It can be written as a sum of positive squares in 4 ways, for example, as 14945956 + 13912900 = 3866^2 + 3730^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4070 + ... + 8618.

Almost surely, 2^28858856 is an apocalyptic number.

28858856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28858856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29620500).

28858856 is an abundant number, since it is smaller than the sum of its proper divisors (30382144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28858856 is a wasteful number, since it uses less digits than its factorization.

28858856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629 (or 4625 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 50.

The square root of 28858856 is about 5372.0439313170. The cubic root of 28858856 is about 306.7324360093.

The spelling of 28858856 in words is "twenty-eight million, eight hundred fifty-eight thousand, eight hundred fifty-six".