3640281568 has 96 divisors (see below), whose sum is σ = 8950169088. Its totient is φ = 1415923200.

The previous prime is 3640281539. The next prime is 3640281569. The reversal of 3640281568 is 8651820463.

3640281568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640281569) 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, 2515021 + ... + 2516467.

It is an arithmetic number, because the mean of its divisors is an integer number (93230928).

Almost surely, 2^3640281568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640281568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4475084544).

3640281568 is an abundant number, since it is smaller than the sum of its proper divisors (5309887520).

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

3640281568 is a wasteful number, since it uses less digits than its factorization.

3640281568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 3640281568 is about 60334.7459429473. The cubic root of 3640281568 is about 1538.3139989857.

The spelling of 3640281568 in words is "three billion, six hundred forty million, two hundred eighty-one thousand, five hundred sixty-eight".