28568670 has 128 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 6359040.

The previous prime is 28568669. The next prime is 28568671. The reversal of 28568670 is 7686582.

It is an interprime number because it is at equal distance from previous prime (28568669) and next prime (28568671).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28568671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 205461 + ... + 205599.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^28568670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28568670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

28568670 is an abundant number, since it is smaller than the sum of its proper divisors (52716450).

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

28568670 is a wasteful number, since it uses less digits than its factorization.

28568670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28568670 is about 5344.9667912907. The cubic root of 28568670 is about 305.7008696266.

The spelling of 28568670 in words is "twenty-eight million, five hundred sixty-eight thousand, six hundred seventy".