3857581389 has 8 divisors (see below), whose sum is σ = 5144617792. Its totient is φ = 2571132960.

The previous prime is 3857581361. The next prime is 3857581411. The reversal of 3857581389 is 9831857583.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3857581389 - 2¹⁵ = 3857548621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3857581339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131449 + ... + 158094.

It is an arithmetic number, because the mean of its divisors is an integer number (643077224).

Almost surely, 2^3857581389 is an apocalyptic number.

It is an amenable number.

3857581389 is a deficient number, since it is larger than the sum of its proper divisors (1287036403).

3857581389 is a wasteful number, since it uses less digits than its factorization.

3857581389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293987.

The product of its digits is 7257600, while the sum is 57.

The square root of 3857581389 is about 62109.4307573335. The cubic root of 3857581389 is about 1568.3333076248. Note that the first 4 decimals are identical.

The spelling of 3857581389 in words is "three billion, eight hundred fifty-seven million, five hundred eighty-one thousand, three hundred eighty-nine".