7881982 has 8 divisors (see below), whose sum is σ = 12518496. Its totient is φ = 3709152.

The previous prime is 7881977. The next prime is 7881983. The reversal of 7881982 is 2891887.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881983) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 115878 + ... + 115945.

It is an arithmetic number, because the mean of its divisors is an integer number (1564812).

Almost surely, 2^7881982 is an apocalyptic number.

7881982 is a deficient number, since it is larger than the sum of its proper divisors (4636514).

7881982 is a wasteful number, since it uses less digits than its factorization.

7881982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231842.

The product of its digits is 64512, while the sum is 43.

The square root of 7881982 is about 2807.4867764604. The cubic root of 7881982 is about 199.0116404393.

The spelling of 7881982 in words is "seven million, eight hundred eighty-one thousand, nine hundred eighty-two".