2631644 has 6 divisors (see below), whose sum is σ = 4605384. Its totient is φ = 1315820.

The previous prime is 2631631. The next prime is 2631647. The reversal of 2631644 is 4461362.

2631644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2²¹ + 6⁵ + 3¹¹ + 1 + 6⁷ + 4⁶ + 4⁸ .

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328952 + ... + 328959.

It is an arithmetic number, because the mean of its divisors is an integer number (767564).

2^2631644 is an apocalyptic number.

It is an amenable number.

2631644 is a deficient number, since it is larger than the sum of its proper divisors (1973740).

2631644 is a wasteful number, since it uses less digits than its factorization.

2631644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657915 (or 657913 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 2631644 is about 1622.2342617514. The cubic root of 2631644 is about 138.0624935745.

The spelling of 2631644 in words is "two million, six hundred thirty-one thousand, six hundred forty-four".