3891685342 has 4 divisors (see below), whose sum is σ = 5837528016. Its totient is φ = 1945842670.

The previous prime is 3891685327. The next prime is 3891685379. The reversal of 3891685342 is 2435861983.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×3891685342² = 30290429602275313928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972921334 + ... + 972921337.

It is an arithmetic number, because the mean of its divisors is an integer number (1459382004).

Almost surely, 2^3891685342 is an apocalyptic number.

3891685342 is a deficient number, since it is larger than the sum of its proper divisors (1945842674).

3891685342 is a wasteful number, since it uses less digits than its factorization.

3891685342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945842673.

The product of its digits is 1244160, while the sum is 49.

The square root of 3891685342 is about 62383.3739228651. The cubic root of 3891685342 is about 1572.9415072200.

The spelling of 3891685342 in words is "three billion, eight hundred ninety-one million, six hundred eighty-five thousand, three hundred forty-two".