2731636 has 12 divisors (see below), whose sum is σ = 4909828. Its totient is φ = 1328832.

The previous prime is 2731621. The next prime is 2731637. The reversal of 2731636 is 6361372.

It can be written as a sum of positive squares in 2 ways, for example, as 2250000 + 481636 = 1500^2 + 694^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9081 + ... + 9376.

2^2731636 is an apocalyptic number.

It is an amenable number.

2731636 is a deficient number, since it is larger than the sum of its proper divisors (2178192).

2731636 is a wasteful number, since it uses less digits than its factorization.

2731636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498 (or 18496 counting only the distinct ones).

The product of its digits is 4536, while the sum is 28.

The square root of 2731636 is about 1652.7661661590. The cubic root of 2731636 is about 139.7894112814.

The spelling of 2731636 in words is "two million, seven hundred thirty-one thousand, six hundred thirty-six".