28563960 has 64 divisors (see below), whose sum is σ = 86561280. Its totient is φ = 7539840.

The previous prime is 28563959. The next prime is 28564001. The reversal of 28563960 is 6936582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11205 + ... + 13515.

It is an arithmetic number, because the mean of its divisors is an integer number (1352520).

Almost surely, 2^28563960 is an apocalyptic number.

28563960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28563960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43280640).

28563960 is an abundant number, since it is smaller than the sum of its proper divisors (57997320).

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

28563960 is a wasteful number, since it uses less digits than its factorization.

28563960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 28563960 is about 5344.5261717013. The cubic root of 28563960 is about 305.6840688184.

The spelling of 28563960 in words is "twenty-eight million, five hundred sixty-three thousand, nine hundred sixty".