7868390 has 16 divisors (see below), whose sum is σ = 14396400. Its totient is φ = 3095520.

The previous prime is 7868381. The next prime is 7868423. The reversal of 7868390 is 938687.

It is a super-2 number, since 2×7868390² = 123823122384200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5840 + ... + 7059.

It is an arithmetic number, because the mean of its divisors is an integer number (899775).

Almost surely, 2^7868390 is an apocalyptic number.

7868390 is a deficient number, since it is larger than the sum of its proper divisors (6528010).

7868390 is a wasteful number, since it uses less digits than its factorization.

7868390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12967.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 7868390 is about 2805.0650616340. The cubic root of 7868390 is about 198.8971801187.

The spelling of 7868390 in words is "seven million, eight hundred sixty-eight thousand, three hundred ninety".