7977968 has 30 divisors (see below), whose sum is σ = 15940944. Its totient is φ = 3866208.

The previous prime is 7977961. The next prime is 7977971. The reversal of 7977968 is 8697797.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7977961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77405 + ... + 77507.

Almost surely, 2^7977968 is an apocalyptic number.

It is an amenable number.

7977968 is a deficient number, since it is larger than the sum of its proper divisors (7962976).

7977968 is a wasteful number, since it uses less digits than its factorization.

7977968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 152 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 53.

The square root of 7977968 is about 2824.5296953652. The cubic root of 7977968 is about 199.8162311969.

The spelling of 7977968 in words is "seven million, nine hundred seventy-seven thousand, nine hundred sixty-eight".