28486656 has 132 divisors (see below), whose sum is σ = 90051624. Its totient is φ = 8601600.

The previous prime is 28486631. The next prime is 28486657. The reversal of 28486656 is 65668482.

It is a tau number, because it is divible by the number of its divisors (132).

It is a super-2 number, since 2×28486656² = 1622979140124672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28486657) 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, 101236 + ... + 101516.

Almost surely, 2^28486656 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 28486656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45025812).

28486656 is an abundant number, since it is smaller than the sum of its proper divisors (61564968).

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

28486656 is a wasteful number, since it uses less digits than its factorization.

28486656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 297 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 28486656 is about 5337.2891995844. The cubic root of 28486656 is about 305.4080572418.

It can be divided in two parts, 28 and 486656, that added together give a palindrome (486684).

The spelling of 28486656 in words is "twenty-eight million, four hundred eighty-six thousand, six hundred fifty-six".