3640131 has 24 divisors (see below), whose sum is σ = 5818176. Its totient is φ = 2174640.

The previous prime is 3640121. The next prime is 3640151. The reversal of 3640131 is 1310463.

It is not a de Polignac number, because 3640131 - 2¹⁰ = 3639107 is a prime.

It is a super-2 number, since 2×3640131² = 26501107394322, which contains 22 as substring.

3640131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3640121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7996 + ... + 8438.

It is an arithmetic number, because the mean of its divisors is an integer number (242424).

Almost surely, 2^3640131 is an apocalyptic number.

3640131 is a deficient number, since it is larger than the sum of its proper divisors (2178045).

3640131 is a wasteful number, since it uses less digits than its factorization.

3640131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3640131 is about 1907.9127338534. The cubic root of 3640131 is about 153.8292789632.

Adding to 3640131 its reverse (1310463), we get a palindrome (4950594).

The spelling of 3640131 in words is "three million, six hundred forty thousand, one hundred thirty-one".