7978382 has 4 divisors (see below), whose sum is σ = 11967576. Its totient is φ = 3989190.

The previous prime is 7978381. The next prime is 7978403. The reversal of 7978382 is 2838797.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994594 + ... + 1994597.

It is an arithmetic number, because the mean of its divisors is an integer number (2991894).

Almost surely, 2^7978382 is an apocalyptic number.

7978382 is a deficient number, since it is larger than the sum of its proper divisors (3989194).

7978382 is a wasteful number, since it uses less digits than its factorization.

7978382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989193.

The product of its digits is 169344, while the sum is 44.

The square root of 7978382 is about 2824.6029809515. The cubic root of 7978382 is about 199.8196874858.

The spelling of 7978382 in words is "seven million, nine hundred seventy-eight thousand, three hundred eighty-two".