28560261 has 16 divisors (see below), whose sum is σ = 38926080. Its totient is φ = 18621120.

The previous prime is 28560251. The next prime is 28560353. The reversal of 28560261 is 16206582.

It is not a de Polignac number, because 28560261 - 2⁵ = 28560229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28560241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43411 + ... + 44063.

It is an arithmetic number, because the mean of its divisors is an integer number (2432880).

Almost surely, 2^28560261 is an apocalyptic number.

It is an amenable number.

28560261 is a deficient number, since it is larger than the sum of its proper divisors (10365819).

28560261 is a wasteful number, since it uses less digits than its factorization.

28560261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28560261 is about 5344.1801054979. The cubic root of 28560261 is about 305.6708730036.

The spelling of 28560261 in words is "twenty-eight million, five hundred sixty thousand, two hundred sixty-one".