7881934 has 4 divisors (see below), whose sum is σ = 11822904. Its totient is φ = 3940966.

The previous prime is 7881919. The next prime is 7881959. The reversal of 7881934 is 4391887.

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

It is a Smith number, since the sum of its digits (40) 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970482 + ... + 1970485.

It is an arithmetic number, because the mean of its divisors is an integer number (2955726).

Almost surely, 2^7881934 is an apocalyptic number.

7881934 is a deficient number, since it is larger than the sum of its proper divisors (3940970).

7881934 is a wasteful number, since it uses less digits than its factorization.

7881934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940969.

The product of its digits is 48384, while the sum is 40.

The square root of 7881934 is about 2807.4782278764. The cubic root of 7881934 is about 199.0112364555.

The spelling of 7881934 in words is "seven million, eight hundred eighty-one thousand, nine hundred thirty-four".