28561902 has 16 divisors (see below), whose sum is σ = 60130560. Its totient is φ = 9019512.

The previous prime is 28561901. The next prime is 28561909. The reversal of 28561902 is 20916582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28561901) 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, 125158 + ... + 125385.

It is an arithmetic number, because the mean of its divisors is an integer number (3758160).

Almost surely, 2^28561902 is an apocalyptic number.

28561902 is an abundant number, since it is smaller than the sum of its proper divisors (31568658).

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

28561902 is a wasteful number, since it uses less digits than its factorization.

28561902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250567.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 28561902 is about 5344.3336347949. Note that the first 3 decimals coincide. The cubic root of 28561902 is about 305.6767272486.

The spelling of 28561902 in words is "twenty-eight million, five hundred sixty-one thousand, nine hundred two".