3856391394 has 32 divisors (see below), whose sum is σ = 7887456000. Its totient is φ = 1256595984.

The previous prime is 3856391389. The next prime is 3856391417. The reversal of 3856391394 is 4931936583.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32937 + ... + 93795.

It is an arithmetic number, because the mean of its divisors is an integer number (246483000).

Almost surely, 2^3856391394 is an apocalyptic number.

3856391394 is an abundant number, since it is smaller than the sum of its proper divisors (4031064606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3856391394 is a wasteful number, since it uses less digits than its factorization.

3856391394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61102.

The product of its digits is 2099520, while the sum is 51.

The square root of 3856391394 is about 62099.8501930560. The cubic root of 3856391394 is about 1568.1720234291.

The spelling of 3856391394 in words is "three billion, eight hundred fifty-six million, three hundred ninety-one thousand, three hundred ninety-four".