3809628261 has 8 divisors (see below), whose sum is σ = 5643893760. Its totient is φ = 2539752156.

The previous prime is 3809628217. The next prime is 3809628337. The reversal of 3809628261 is 1628269083.

3809628261 is a `hidden beast` number, since 380 + 9 + 6 + 2 + 8 + 261 = 666.

It is not a de Polignac number, because 3809628261 - 2⁹ = 3809627749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3809628211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70548645 + ... + 70548698.

It is an arithmetic number, because the mean of its divisors is an integer number (705486720).

Almost surely, 2^3809628261 is an apocalyptic number.

It is an amenable number.

3809628261 is a deficient number, since it is larger than the sum of its proper divisors (1834265499).

3809628261 is a wasteful number, since it uses less digits than its factorization.

3809628261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141097352 (or 141097346 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 3809628261 is about 61722.1861327027. The cubic root of 3809628261 is about 1561.8076051244.

The spelling of 3809628261 in words is "three billion, eight hundred nine million, six hundred twenty-eight thousand, two hundred sixty-one".