2686398 has 64 divisors (see below), whose sum is σ = 6580224. Its totient is φ = 720000.

The previous prime is 2686393. The next prime is 2686451. The reversal of 2686398 is 8936862.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2686393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26548 + ... + 26648.

It is an arithmetic number, because the mean of its divisors is an integer number (102816).

2^2686398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2686398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3290112).

2686398 is an abundant number, since it is smaller than the sum of its proper divisors (3893826).

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

2686398 is a wasteful number, since it uses less digits than its factorization.

2686398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161.

The product of its digits is 124416, while the sum is 42.

The square root of 2686398 is about 1639.0234897646. The cubic root of 2686398 is about 139.0134383088.

It can be divided in two parts, 268 and 6398, that added together give a palindrome (6666).

The spelling of 2686398 in words is "two million, six hundred eighty-six thousand, three hundred ninety-eight".