3891942 has 16 divisors (see below), whose sum is σ = 8648880. Its totient is φ = 1297296.

The previous prime is 3891917. The next prime is 3891971. The reversal of 3891942 is 2491983.

It is a junction number, because it is equal to n+sod(n) for n = 3891897 and 3891906.

It is a congruent number.

It is an unprimeable number.

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, 35983 + ... + 36090.

It is an arithmetic number, because the mean of its divisors is an integer number (540555).

Almost surely, 2^3891942 is an apocalyptic number.

3891942 is an abundant number, since it is smaller than the sum of its proper divisors (4756938).

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

3891942 is a wasteful number, since it uses less digits than its factorization.

3891942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72084 (or 72078 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3891942 is about 1972.8005474452. The cubic root of 3891942 is about 157.2976085139.

The spelling of 3891942 in words is "three million, eight hundred ninety-one thousand, nine hundred forty-two".