2631646 has 4 divisors (see below), whose sum is σ = 3947472. Its totient is φ = 1315822.

The previous prime is 2631631. The next prime is 2631647. The reversal of 2631646 is 6461362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6461362 = 2 ⋅3230681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657910 + ... + 657913.

It is an arithmetic number, because the mean of its divisors is an integer number (986868).

2^2631646 is an apocalyptic number.

2631646 is a deficient number, since it is larger than the sum of its proper divisors (1315826).

2631646 is a wasteful number, since it uses less digits than its factorization.

2631646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315825.

The product of its digits is 5184, while the sum is 28.

The square root of 2631646 is about 1622.2348781850. The cubic root of 2631646 is about 138.0625285495.

It can be divided in two parts, 26316 and 46, that added together give a palindrome (26362).

The spelling of 2631646 in words is "two million, six hundred thirty-one thousand, six hundred forty-six".