28246117786 has 8 divisors (see below), whose sum is σ = 42371331444. Its totient is φ = 14122340640.

The previous prime is 28246117777. The next prime is 28246117787. The reversal of 28246117786 is 68771164282.

It can be written as a sum of positive squares in 2 ways, for example, as 28163216761 + 82901025 = 167819^2 + 9105^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28246117787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308545 + ... + 389476.

Almost surely, 2^28246117786 is an apocalyptic number.

28246117786 is a deficient number, since it is larger than the sum of its proper divisors (14125213658).

28246117786 is a wasteful number, since it uses less digits than its factorization.

28246117786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718256.

The product of its digits is 1806336, while the sum is 52.

The spelling of 28246117786 in words is "twenty-eight billion, two hundred forty-six million, one hundred seventeen thousand, seven hundred eighty-six".