28567836 has 96 divisors (see below), whose sum is σ = 81849600. Its totient is φ = 8544960.

The previous prime is 28567801. The next prime is 28567873. The reversal of 28567836 is 63876582.

28567836 is a `hidden beast` number, since 2 + 8 + 567 + 83 + 6 = 666.

It is a super-2 number, since 2×28567836² = 1632242507445792, which contains 22 as substring.

Its product of digits (483840) is a multiple of the sum of its prime factors (336).

It is a junction number, because it is equal to n+sod(n) for n = 28567791 and 28567800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165046 + ... + 165218.

It is an arithmetic number, because the mean of its divisors is an integer number (852600).

Almost surely, 2^28567836 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 28567836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40924800).

28567836 is an abundant number, since it is smaller than the sum of its proper divisors (53281764).

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

28567836 is a wasteful number, since it uses less digits than its factorization.

28567836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 328 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28567836 is about 5344.8887733984. Note that the first 3 decimals coincide. The cubic root of 28567836 is about 305.6978948410.

It can be divided in two parts, 28567 and 836, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 28567836 in words is "twenty-eight million, five hundred sixty-seven thousand, eight hundred thirty-six".