7978841 has 8 divisors (see below), whose sum is σ = 9045120. Its totient is φ = 6977232.

The previous prime is 7978837. The next prime is 7978847. The reversal of 7978841 is 1488797.

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

It is a cyclic number.

It is not a de Polignac number, because 7978841 - 2² = 7978837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7978792 and 7978801.

It is not an unprimeable number, because it can be changed into a prime (7978847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15905 + ... + 16398.

It is an arithmetic number, because the mean of its divisors is an integer number (1130640).

Almost surely, 2^7978841 is an apocalyptic number.

It is an amenable number.

7978841 is a deficient number, since it is larger than the sum of its proper divisors (1066279).

7978841 is a wasteful number, since it uses less digits than its factorization.

7978841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32335.

The product of its digits is 112896, while the sum is 44.

The square root of 7978841 is about 2824.6842301397. The cubic root of 7978841 is about 199.8235193187.

Subtracting from 7978841 its sum of digits (44), we obtain a palindrome (7978797).

The spelling of 7978841 in words is "seven million, nine hundred seventy-eight thousand, eight hundred forty-one".