7868026 has 4 divisors (see below), whose sum is σ = 11802042. Its totient is φ = 3934012.

The previous prime is 7867999. The next prime is 7868027. The reversal of 7868026 is 6208687.

It is a Cunningham number, because it is equal to 2805²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6208687 = 19 ⋅326773.

It can be written as a sum of positive squares in only one way, i.e., 7868025 + 1 = 2805^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (7868027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1967005 + ... + 1967008.

Almost surely, 2^7868026 is an apocalyptic number.

7868026 is a deficient number, since it is larger than the sum of its proper divisors (3934016).

7868026 is a wasteful number, since it uses less digits than its factorization.

7868026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934015.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 7868026 is about 2805.0001782531. Note that the first 3 decimals coincide. The cubic root of 7868026 is about 198.8941130072.

The spelling of 7868026 in words is "seven million, eight hundred sixty-eight thousand, twenty-six".