3798129861 has 6 divisors (see below), whose sum is σ = 5486187590. Its totient is φ = 2532086568.

The previous prime is 3798129857. The next prime is 3798129893. The reversal of 3798129861 is 1689218973.

3798129861 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3335062500 + 463067361 = 57750^2 + 21519^2 .

It is not a de Polignac number, because 3798129861 - 2² = 3798129857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3798129798 and 3798129807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3798129821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211007206 + ... + 211007223.

Almost surely, 2^3798129861 is an apocalyptic number.

It is an amenable number.

3798129861 is a deficient number, since it is larger than the sum of its proper divisors (1688057729).

3798129861 is a wasteful number, since it uses less digits than its factorization.

3798129861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422014435 (or 422014432 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 3798129861 is about 61628.9693326118. The cubic root of 3798129861 is about 1560.2347144370.

The spelling of 3798129861 in words is "three billion, seven hundred ninety-eight million, one hundred twenty-nine thousand, eight hundred sixty-one".