28201744345 has 8 divisors (see below), whose sum is σ = 34305683976. Its totient is φ = 22252334976.

The previous prime is 28201744339. The next prime is 28201744349. The reversal of 28201744345 is 54344710282.

It can be written as a sum of positive squares in 4 ways, for example, as 2620620864 + 25581123481 = 51192^2 + 159941^2 .

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 28201744345 - 2²³ = 28193355737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28201744298 and 28201744307.

It is not an unprimeable number, because it can be changed into a prime (28201744349) 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, 38632162 + ... + 38632891.

It is an arithmetic number, because the mean of its divisors is an integer number (4288210497).

Almost surely, 2^28201744345 is an apocalyptic number.

It is an amenable number.

28201744345 is a deficient number, since it is larger than the sum of its proper divisors (6103939631).

28201744345 is an equidigital number, since it uses as much as digits as its factorization.

28201744345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77265131.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 28201744345 in words is "twenty-eight billion, two hundred one million, seven hundred forty-four thousand, three hundred forty-five".