7881942 has 8 divisors (see below), whose sum is σ = 15763896. Its totient is φ = 2627312.

The previous prime is 7881919. The next prime is 7881959. The reversal of 7881942 is 2491887.

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

7881942 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 7881942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656823 + ... + 656834.

It is an arithmetic number, because the mean of its divisors is an integer number (1970487).

Almost surely, 2^7881942 is an apocalyptic number.

7881942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7881942 is a wasteful number, since it uses less digits than its factorization.

7881942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313662.

The product of its digits is 32256, while the sum is 39.

The square root of 7881942 is about 2807.4796526422. The cubic root of 7881942 is about 199.0113037862.

The spelling of 7881942 in words is "seven million, eight hundred eighty-one thousand, nine hundred forty-two".