7997018 has 8 divisors (see below), whose sum is σ = 12057012. Its totient is φ = 3978016.

The previous prime is 7996997. The next prime is 7997029. The reversal of 7997018 is 8107997.

It can be written as a sum of positive squares in 2 ways, for example, as 7252249 + 744769 = 2693^2 + 863^2 .

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

It is a Curzon number.

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, 9755 + ... + 10542.

Almost surely, 2^7997018 is an apocalyptic number.

7997018 is a deficient number, since it is larger than the sum of its proper divisors (4059994).

7997018 is a wasteful number, since it uses less digits than its factorization.

7997018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20496.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 7997018 is about 2827.8999275080. The cubic root of 7997018 is about 199.9751469117.

The spelling of 7997018 in words is "seven million, nine hundred ninety-seven thousand, eighteen".