7978016 has 24 divisors (see below), whose sum is σ = 16250220. Its totient is φ = 3851008.

The previous prime is 7977997. The next prime is 7978021. The reversal of 7978016 is 6108797.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7862416 + 115600 = 2804^2 + 340^2 .

It is a pancake number, because a pancake can be divided into 7978016 parts by 3994 straight cuts.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3371 + ... + 5226.

Almost surely, 2^7978016 is an apocalyptic number.

It is an amenable number.

7978016 is an abundant number, since it is smaller than the sum of its proper divisors (8272204).

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

7978016 is a wasteful number, since it uses less digits than its factorization.

7978016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636 (or 8628 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 7978016 is about 2824.5381923422. The cubic root of 7978016 is about 199.8166319321.

The spelling of 7978016 in words is "seven million, nine hundred seventy-eight thousand, sixteen".