7866738 has 48 divisors (see below), whose sum is σ = 18903456. Its totient is φ = 2344320.

The previous prime is 7866731. The next prime is 7866739. The reversal of 7866738 is 8376687.

It is a junction number, because it is equal to n+sod(n) for n = 7866693 and 7866702.

It is not an unprimeable number, because it can be changed into a prime (7866731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12970 + ... + 13562.

It is an arithmetic number, because the mean of its divisors is an integer number (393822).

Almost surely, 2^7866738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7866738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9451728).

7866738 is an abundant number, since it is smaller than the sum of its proper divisors (11036718).

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

7866738 is a wasteful number, since it uses less digits than its factorization.

7866738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 676 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 7866738 is about 2804.7705788531. The cubic root of 7866738 is about 198.8832593912.

The spelling of 7866738 in words is "seven million, eight hundred sixty-six thousand, seven hundred thirty-eight".