3640722829 has 16 divisors (see below), whose sum is σ = 3882530880. Its totient is φ = 3404177280.

The previous prime is 3640722817. The next prime is 3640722859. The reversal of 3640722829 is 9282270463.

It is a cyclic number.

It is not a de Polignac number, because 3640722829 - 2⁹ = 3640722317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640722859) 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, 568087 + ... + 574459.

It is an arithmetic number, because the mean of its divisors is an integer number (242658180).

Almost surely, 2^3640722829 is an apocalyptic number.

It is an amenable number.

3640722829 is a deficient number, since it is larger than the sum of its proper divisors (241808051).

3640722829 is a wasteful number, since it uses less digits than its factorization.

3640722829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 3640722829 is about 60338.4026056375. The cubic root of 3640722829 is about 1538.3761526530.

The spelling of 3640722829 in words is "three billion, six hundred forty million, seven hundred twenty-two thousand, eight hundred twenty-nine".