2686634 has 4 divisors (see below), whose sum is σ = 4029954. Its totient is φ = 1343316.

The previous prime is 2686631. The next prime is 2686667. The reversal of 2686634 is 4366862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4366862 = 2 ⋅2183431.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 1329409 = 1165^2 + 1153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2686594 and 2686603.

It is not an unprimeable number, because it can be changed into a prime (2686631) by changing a digit.

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 as a sum of consecutive naturals, namely, 671657 + ... + 671660.

2^2686634 is an apocalyptic number.

2686634 is a deficient number, since it is larger than the sum of its proper divisors (1343320).

2686634 is a wasteful number, since it uses less digits than its factorization.

2686634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343319.

The product of its digits is 41472, while the sum is 35.

The square root of 2686634 is about 1639.0954822706. The cubic root of 2686634 is about 139.0175089653.

The spelling of 2686634 in words is "two million, six hundred eighty-six thousand, six hundred thirty-four".