28159456 has 72 divisors (see below), whose sum is σ = 61979904. Its totient is φ = 12579840.

The previous prime is 28159451. The next prime is 28159457. The reversal of 28159456 is 65495182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28159451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221665 + ... + 221791.

It is an arithmetic number, because the mean of its divisors is an integer number (860832).

Almost surely, 2^28159456 is an apocalyptic number.

28159456 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 28159456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30989952).

28159456 is an abundant number, since it is smaller than the sum of its proper divisors (33820448).

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

28159456 is a wasteful number, since it uses less digits than its factorization.

28159456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 183 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 28159456 is about 5306.5484073925. The cubic root of 28159456 is about 304.2342377516.

The spelling of 28159456 in words is "twenty-eight million, one hundred fifty-nine thousand, four hundred fifty-six".