3640265236 has 12 divisors (see below), whose sum is σ = 6386042740. Its totient is φ = 1815681600.

The previous prime is 3640265173. The next prime is 3640265311. The reversal of 3640265236 is 6325620463.

It can be written as a sum of positive squares in 2 ways, for example, as 2218975236 + 1421290000 = 47106^2 + 37700^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3640265195 and 3640265204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110915 + ... + 1114186.

Almost surely, 2^3640265236 is an apocalyptic number.

It is an amenable number.

3640265236 is a deficient number, since it is larger than the sum of its proper divisors (2745777504).

3640265236 is a wasteful number, since it uses less digits than its factorization.

3640265236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225514 (or 2225512 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 3640265236 is about 60334.6105978981. The cubic root of 3640265236 is about 1538.3116984510.

Adding to 3640265236 its reverse (6325620463), we get a palindrome (9965885699).

The spelling of 3640265236 in words is "three billion, six hundred forty million, two hundred sixty-five thousand, two hundred thirty-six".