1839865345 has 16 divisors (see below), whose sum is σ = 2283909120. Its totient is φ = 1421380800.

The previous prime is 1839865343. The next prime is 1839865369. The reversal of 1839865345 is 5435689381.

It is not a de Polignac number, because 1839865345 - 2¹ = 1839865343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1839865292 and 1839865301.

It is not an unprimeable number, because it can be changed into a prime (1839865343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61855 + ... + 86635.

It is an arithmetic number, because the mean of its divisors is an integer number (142744320).

Almost surely, 2^1839865345 is an apocalyptic number.

It is an amenable number.

1839865345 is a deficient number, since it is larger than the sum of its proper divisors (444043775).

1839865345 is a wasteful number, since it uses less digits than its factorization.

1839865345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25296.

The product of its digits is 3110400, while the sum is 52.

The square root of 1839865345 is about 42893.6515699002. The cubic root of 1839865345 is about 1225.3552422448.

The spelling of 1839865345 in words is "one billion, eight hundred thirty-nine million, eight hundred sixty-five thousand, three hundred forty-five".