7981894 has 8 divisors (see below), whose sum is σ = 12060648. Its totient is φ = 3961680.

The previous prime is 7981889. The next prime is 7981907. The reversal of 7981894 is 4981897.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 14292 + ... + 14839.

It is an arithmetic number, because the mean of its divisors is an integer number (1507581).

Almost surely, 2^7981894 is an apocalyptic number.

7981894 is a deficient number, since it is larger than the sum of its proper divisors (4078754).

7981894 is a wasteful number, since it uses less digits than its factorization.

7981894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29270.

The product of its digits is 145152, while the sum is 46.

The square root of 7981894 is about 2825.2245928421. The cubic root of 7981894 is about 199.8490026944.

The spelling of 7981894 in words is "seven million, nine hundred eighty-one thousand, eight hundred ninety-four".