28563260 has 96 divisors (see below), whose sum is σ = 70096320. Its totient is φ = 9757440.

The previous prime is 28563253. The next prime is 28563277. The reversal of 28563260 is 6236582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 771962 + ... + 771998.

It is an arithmetic number, because the mean of its divisors is an integer number (730170).

Almost surely, 2^28563260 is an apocalyptic number.

28563260 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 28563260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35048160).

28563260 is an abundant number, since it is smaller than the sum of its proper divisors (41533060).

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

28563260 is a wasteful number, since it uses less digits than its factorization.

28563260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 28563260 is about 5344.4606837360. The cubic root of 28563260 is about 305.6815717254.

It can be divided in two parts, 2856 and 3260, that added together give a palindrome (6116).

The spelling of 28563260 in words is "twenty-eight million, five hundred sixty-three thousand, two hundred sixty".