28601811243 has 24 divisors (see below), whose sum is σ = 42396539328. Its totient is φ = 18570675312.

The previous prime is 28601811239. The next prime is 28601811257. The reversal of 28601811243 is 34211810682.

28601811243 is a `hidden beast` number, since 2 + 8 + 601 + 8 + 1 + 1 + 2 + 43 = 666.

It is not a de Polignac number, because 28601811243 - 2² = 28601811239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28601811198 and 28601811207.

It is not an unprimeable number, because it can be changed into a prime (28601811283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27796 + ... + 240782.

It is an arithmetic number, because the mean of its divisors is an integer number (1766522472).

Almost surely, 2^28601811243 is an apocalyptic number.

28601811243 is a deficient number, since it is larger than the sum of its proper divisors (13794728085).

28601811243 is a wasteful number, since it uses less digits than its factorization.

28601811243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213383 (or 213380 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 28601811243 in words is "twenty-eight billion, six hundred one million, eight hundred eleven thousand, two hundred forty-three".