28000560 has 120 divisors (see below), whose sum is σ = 101015856. Its totient is φ = 6397440.

The previous prime is 28000559. The next prime is 28000561. The reversal of 28000560 is 6500082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28000559) and next prime (28000561).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (28000561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10570 + ... + 12950.

Almost surely, 2^28000560 is an apocalyptic number.

28000560 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 28000560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50507928).

28000560 is an abundant number, since it is smaller than the sum of its proper divisors (73015296).

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

28000560 is a wasteful number, since it uses less digits than its factorization.

28000560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 28000560 is about 5291.5555368908. Note that the first 4 decimals coincide. The cubic root of 28000560 is about 303.6609215667.

The spelling of 28000560 in words is "twenty-eight million, five hundred sixty", and thus it is an aban number.