28086436 has 12 divisors (see below), whose sum is σ = 56172928. Its totient is φ = 12037032.

The previous prime is 28086433. The next prime is 28086451. The reversal of 28086436 is 63468082.

28086436 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28086395 and 28086404.

It is not an unprimeable number, because it can be changed into a prime (28086433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501516 + ... + 501571.

Almost surely, 2^28086436 is an apocalyptic number.

It is an amenable number.

28086436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28086436 is a wasteful number, since it uses less digits than its factorization.

28086436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003098 (or 1003096 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 28086436 is about 5299.6637629193. The cubic root of 28086436 is about 303.9710412166.

It can be divided in two parts, 280864 and 36, that added together give a square (280900 = 530²).

The spelling of 28086436 in words is "twenty-eight million, eighty-six thousand, four hundred thirty-six".