28561912 has 48 divisors (see below), whose sum is σ = 57718080. Its totient is φ = 13228800.

The previous prime is 28561909. The next prime is 28561913. The reversal of 28561912 is 21916582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28561913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 538878 + ... + 538930.

It is an arithmetic number, because the mean of its divisors is an integer number (1202460).

Almost surely, 2^28561912 is an apocalyptic number.

It is an amenable number.

28561912 is an abundant number, since it is smaller than the sum of its proper divisors (29156168).

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

28561912 is a wasteful number, since it uses less digits than its factorization.

28561912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 127 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 28561912 is about 5344.3345703651. The cubic root of 28561912 is about 305.6767629228.

The spelling of 28561912 in words is "twenty-eight million, five hundred sixty-one thousand, nine hundred twelve".