28223277261 has 8 divisors (see below), whose sum is σ = 37666242720. Its totient is φ = 18797914992.

The previous prime is 28223277259. The next prime is 28223277319. The reversal of 28223277261 is 16277232282.

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

It is not a de Polignac number, because 28223277261 - 2¹ = 28223277259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223277961) 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, 4397055 + ... + 4403468.

It is an arithmetic number, because the mean of its divisors is an integer number (4708280340).

Almost surely, 2^28223277261 is an apocalyptic number.

It is an amenable number.

28223277261 is a deficient number, since it is larger than the sum of its proper divisors (9442965459).

28223277261 is a wasteful number, since it uses less digits than its factorization.

28223277261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8801595.

The product of its digits is 225792, while the sum is 42.

The spelling of 28223277261 in words is "twenty-eight billion, two hundred twenty-three million, two hundred seventy-seven thousand, two hundred sixty-one".