7941978 has 24 divisors (see below), whose sum is σ = 18772416. Its totient is φ = 2406600.

The previous prime is 7941977. The next prime is 7941991. The reversal of 7941978 is 8791497.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7941977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19858 + ... + 20253.

It is an arithmetic number, because the mean of its divisors is an integer number (782184).

Almost surely, 2^7941978 is an apocalyptic number.

7941978 is an abundant number, since it is smaller than the sum of its proper divisors (10830438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7941978 is a wasteful number, since it uses less digits than its factorization.

7941978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40130 (or 40127 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 7941978 is about 2818.1515218313. The cubic root of 7941978 is about 199.5153096586.

It can be divided in two parts, 79419 and 78, that added together give a palindrome (79497).

The spelling of 7941978 in words is "seven million, nine hundred forty-one thousand, nine hundred seventy-eight".