28169856 has 320 divisors, whose sum is σ = 103672800. Its totient is φ = 7464960.

The previous prime is 28169821. The next prime is 28169881. The reversal of 28169856 is 65896182.

Its product of digits (207360) is a multiple of the sum of its prime divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1482615 + ... + 1482633.

Almost surely, 2^28169856 is an apocalyptic number.

28169856 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 28169856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51836400).

28169856 is an abundant number, since it is smaller than the sum of its proper divisors (75502944).

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

28169856 is a wasteful number, since it uses less digits than its factorization.

28169856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 48 counting only the distinct ones).

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

The square root of 28169856 is about 5307.5282382668. The cubic root of 28169856 is about 304.2716869437.

The spelling of 28169856 in words is "twenty-eight million, one hundred sixty-nine thousand, eight hundred fifty-six".