28486866 has 32 divisors (see below), whose sum is σ = 60697728. Its totient is φ = 8881920.

The previous prime is 28486819. The next prime is 28486877. The reversal of 28486866 is 66868482.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17691 + ... + 19233.

It is an arithmetic number, because the mean of its divisors is an integer number (1896804).

Almost surely, 2^28486866 is an apocalyptic number.

28486866 is an abundant number, since it is smaller than the sum of its proper divisors (32210862).

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

28486866 is a wasteful number, since it uses less digits than its factorization.

28486866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746.

The product of its digits is 884736, while the sum is 48.

The square root of 28486866 is about 5337.3088724562. The cubic root of 28486866 is about 305.4088077164.

The spelling of 28486866 in words is "twenty-eight million, four hundred eighty-six thousand, eight hundred sixty-six".