3235640646 has 64 divisors (see below), whose sum is σ = 7628359680. Its totient is φ = 895785600.

The previous prime is 3235640627. The next prime is 3235640647. The reversal of 3235640646 is 6460465323.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3235640647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191260 + ... + 207488.

It is an arithmetic number, because the mean of its divisors is an integer number (119193120).

Almost surely, 2^3235640646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3235640646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3814179840).

3235640646 is an abundant number, since it is smaller than the sum of its proper divisors (4392719034).

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

3235640646 is a wasteful number, since it uses less digits than its factorization.

3235640646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16389.

The product of its (nonzero) digits is 311040, while the sum is 39.

The square root of 3235640646 is about 56882.6919721632. The cubic root of 3235640646 is about 1479.0632991125.

The spelling of 3235640646 in words is "three billion, two hundred thirty-five million, six hundred forty thousand, six hundred forty-six".