7868138 has 8 divisors (see below), whose sum is σ = 11912832. Its totient is φ = 3897196.

The previous prime is 7868137. The next prime is 7868153. The reversal of 7868138 is 8318687.

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

It is a junction number, because it is equal to n+sod(n) for n = 7868095 and 7868104.

It is not an unprimeable number, because it can be changed into a prime (7868131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18170 + ... + 18597.

It is an arithmetic number, because the mean of its divisors is an integer number (1489104).

Almost surely, 2^7868138 is an apocalyptic number.

7868138 is a deficient number, since it is larger than the sum of its proper divisors (4044694).

7868138 is a wasteful number, since it uses less digits than its factorization.

7868138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36876.

The product of its digits is 64512, while the sum is 41.

The square root of 7868138 is about 2805.0201425302. The cubic root of 7868138 is about 198.8950567439.

The spelling of 7868138 in words is "seven million, eight hundred sixty-eight thousand, one hundred thirty-eight".