28687266 has 24 divisors (see below), whose sum is σ = 63033984. Its totient is φ = 9427320.

The previous prime is 28687231. The next prime is 28687271. The reversal of 28687266 is 66278682.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9946 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (2626416).

Almost surely, 2^28687266 is an apocalyptic number.

28687266 is an abundant number, since it is smaller than the sum of its proper divisors (34346718).

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

28687266 is a wasteful number, since it uses less digits than its factorization.

28687266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22526 (or 22523 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28687266 is about 5356.0494769933. The cubic root of 28687266 is about 306.1233003040.

The spelling of 28687266 in words is "twenty-eight million, six hundred eighty-seven thousand, two hundred sixty-six".