28705914 has 40 divisors (see below), whose sum is σ = 65165760. Its totient is φ = 9443304.

The previous prime is 28705891. The next prime is 28705921. The reversal of 28705914 is 41950782.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11677 + ... + 13919.

It is an arithmetic number, because the mean of its divisors is an integer number (1629144).

Almost surely, 2^28705914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28705914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32582880).

28705914 is an abundant number, since it is smaller than the sum of its proper divisors (36459846).

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

28705914 is a wasteful number, since it uses less digits than its factorization.

28705914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28705914 is about 5357.7900294804. The cubic root of 28705914 is about 306.1896171942.

The spelling of 28705914 in words is "twenty-eight million, seven hundred five thousand, nine hundred fourteen".