28086464 has 56 divisors (see below), whose sum is σ = 64666368. Its totient is φ = 11854080.

The previous prime is 28086463. The next prime is 28086469. The reversal of 28086464 is 46468082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (28086463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31367 + ... + 32249.

Almost surely, 2^28086464 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 28086464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32333184).

28086464 is an abundant number, since it is smaller than the sum of its proper divisors (36579904).

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

28086464 is an equidigital number, since it uses as much as digits as its factorization.

28086464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 28086464 is about 5299.6664045957. Note that the first 3 decimals coincide. The cubic root of 28086464 is about 303.9711422284.

The spelling of 28086464 in words is "twenty-eight million, eighty-six thousand, four hundred sixty-four".