2686390 has 16 divisors (see below), whose sum is σ = 5526432. Its totient is φ = 921024.

The previous prime is 2686381. The next prime is 2686393. The reversal of 2686390 is 936862.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 19119 + ... + 19258.

It is an arithmetic number, because the mean of its divisors is an integer number (345402).

2^2686390 is an apocalyptic number.

2686390 is an abundant number, since it is smaller than the sum of its proper divisors (2840042).

2686390 is a wasteful number, since it uses less digits than its factorization.

2686390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38391.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2686390 is about 1639.0210492852. The cubic root of 2686390 is about 139.0133003163.

It can be divided in two parts, 26 and 86390, that multiplied together give a triangular number (2246140 = T₂₁₁₉).

The spelling of 2686390 in words is "two million, six hundred eighty-six thousand, three hundred ninety".