32561280 has 96 divisors (see below), whose sum is σ = 112458060. Its totient is φ = 8681472.

The previous prime is 32561279. The next prime is 32561293. The reversal of 32561280 is 8216523.

32561280 is a `hidden beast` number, since 325 + 61 + 280 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32353344 + 207936 = 5688^2 + 456^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2934 + ... + 8586.

Almost surely, 2^32561280 is an apocalyptic number.

32561280 is a gapful number since it is divisible by the number (30) 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 32561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56229030).

32561280 is an abundant number, since it is smaller than the sum of its proper divisors (79896780).

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

32561280 is a wasteful number, since it uses less digits than its factorization.

32561280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5678 (or 5663 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 32561280 is about 5706.2492059145. The cubic root of 32561280 is about 319.3256633003.

The spelling of 32561280 in words is "thirty-two million, five hundred sixty-one thousand, two hundred eighty".