28873668 has 12 divisors (see below), whose sum is σ = 67371920. Its totient is φ = 9624552.

The previous prime is 28873627. The next prime is 28873687. The reversal of 28873668 is 86637882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203058 + ... + 1203081.

Almost surely, 2^28873668 is an apocalyptic number.

It is an amenable number.

28873668 is an abundant number, since it is smaller than the sum of its proper divisors (38498252).

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

28873668 is a wasteful number, since it uses less digits than its factorization.

28873668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406146 (or 2406144 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 28873668 is about 5373.4223731250. The cubic root of 28873668 is about 306.7849045221.

It can be divided in two parts, 2887 and 3668, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 28873668 in words is "twenty-eight million, eight hundred seventy-three thousand, six hundred sixty-eight".