28500261 has 8 divisors (see below), whose sum is σ = 38050560. Its totient is φ = 18975072.

The previous prime is 28500239. The next prime is 28500287. The reversal of 28500261 is 16200582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28500261 - 2¹⁴ = 28483877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3445 + ... + 8298.

It is an arithmetic number, because the mean of its divisors is an integer number (4756320).

Almost surely, 2^28500261 is an apocalyptic number.

It is an amenable number.

28500261 is a deficient number, since it is larger than the sum of its proper divisors (9550299).

28500261 is a wasteful number, since it uses less digits than its factorization.

28500261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28500261 is about 5338.5635708494. The cubic root of 28500261 is about 305.4566696555.

The spelling of 28500261 in words is "twenty-eight million, five hundred thousand, two hundred sixty-one".