28156896 has 168 divisors, whose sum is σ = 89241264. Its totient is φ = 8709120.

The previous prime is 28156871. The next prime is 28156927. The reversal of 28156896 is 69865182.

28156896 is a `hidden beast` number, since 2 + 81 + 568 + 9 + 6 = 666.

It is a congruent number.

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 27 ways as a sum of consecutive naturals, for example, 396541 + ... + 396611.

It is an arithmetic number, because the mean of its divisors is an integer number (531198).

Almost surely, 2^28156896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28156896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44620632).

28156896 is an abundant number, since it is smaller than the sum of its proper divisors (61084368).

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

28156896 is an equidigital number, since it uses as much as digits as its factorization.

28156896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 93 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28156896 is about 5306.3071905045. The cubic root of 28156896 is about 304.2250180748.

The spelling of 28156896 in words is "twenty-eight million, one hundred fifty-six thousand, eight hundred ninety-six".