28001824261 has 8 divisors (see below), whose sum is σ = 30066583104. Its totient is φ = 25983464640.

The previous prime is 28001824231. The next prime is 28001824289. The reversal of 28001824261 is 16242810082.

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

It is a cyclic number.

It is not a de Polignac number, because 28001824261 - 2⁵ = 28001824229 is a prime.

It is a super-2 number, since 2×28001824261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001824211) 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, 11598555 + ... + 11600968.

It is an arithmetic number, because the mean of its divisors is an integer number (3758322888).

Almost surely, 2^28001824261 is an apocalyptic number.

It is an amenable number.

28001824261 is a deficient number, since it is larger than the sum of its proper divisors (2064758843).

28001824261 is a wasteful number, since it uses less digits than its factorization.

28001824261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23199611.

The product of its (nonzero) digits is 12288, while the sum is 34.

The spelling of 28001824261 in words is "twenty-eight billion, one million, eight hundred twenty-four thousand, two hundred sixty-one".