28725894 has 32 divisors (see below), whose sum is σ = 65046240. Its totient is φ = 9393696.

The previous prime is 28725881. The next prime is 28725899. The reversal of 28725894 is 49852782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28725899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2157 + ... + 7880.

It is an arithmetic number, because the mean of its divisors is an integer number (2032695).

Almost surely, 2^28725894 is an apocalyptic number.

28725894 is an abundant number, since it is smaller than the sum of its proper divisors (36320346).

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

28725894 is a wasteful number, since it uses less digits than its factorization.

28725894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101 (or 10095 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28725894 is about 5359.6542798953. The cubic root of 28725894 is about 306.2606391417.

The spelling of 28725894 in words is "twenty-eight million, seven hundred twenty-five thousand, eight hundred ninety-four".