28206870 has 16 divisors (see below), whose sum is σ = 67696560. Its totient is φ = 7521824.

The previous prime is 28206797. The next prime is 28206877. The reversal of 28206870 is 7860282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470085 + ... + 470144.

It is an arithmetic number, because the mean of its divisors is an integer number (4231035).

Almost surely, 2^28206870 is an apocalyptic number.

28206870 is an abundant number, since it is smaller than the sum of its proper divisors (39489690).

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

28206870 is a wasteful number, since it uses less digits than its factorization.

28206870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940239.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28206870 is about 5311.0140274716. The cubic root of 28206870 is about 304.4048953289.

The spelling of 28206870 in words is "twenty-eight million, two hundred six thousand, eight hundred seventy".