3640413726 has 32 divisors (see below), whose sum is σ = 8108543520. Its totient is φ = 1210660992.

The previous prime is 3640413659. The next prime is 3640413727. The reversal of 3640413726 is 6273140463.

It is a happy number.

3640413726 is a `hidden beast` number, since 3 + 640 + 4 + 1 + 3 + 7 + 2 + 6 = 666.

It is a super-2 number, since 2×3640413726² = 26505224192898406152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640413727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54465 + ... + 101228.

It is an arithmetic number, because the mean of its divisors is an integer number (253391985).

Almost surely, 2^3640413726 is an apocalyptic number.

3640413726 is an abundant number, since it is smaller than the sum of its proper divisors (4468129794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3640413726 is a wasteful number, since it uses less digits than its factorization.

3640413726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156137 (or 156131 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 3640413726 is about 60335.8411394090. The cubic root of 3640413726 is about 1538.3326145824.

The spelling of 3640413726 in words is "three billion, six hundred forty million, four hundred thirteen thousand, seven hundred twenty-six".