28213896 has 16 divisors (see below), whose sum is σ = 70534800. Its totient is φ = 9404624.

The previous prime is 28213873. The next prime is 28213907. The reversal of 28213896 is 69831282.

It is a happy number.

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, 587766 + ... + 587813.

It is an arithmetic number, because the mean of its divisors is an integer number (4408425).

Almost surely, 2^28213896 is an apocalyptic number.

It is an amenable number.

28213896 is an abundant number, since it is smaller than the sum of its proper divisors (42320904).

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

28213896 is a wasteful number, since it uses less digits than its factorization.

28213896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175588 (or 1175584 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 28213896 is about 5311.6754418921. The cubic root of 28213896 is about 304.4301677919.

The spelling of 28213896 in words is "twenty-eight million, two hundred thirteen thousand, eight hundred ninety-six".