3640220291 has 8 divisors (see below), whose sum is σ = 3821337600. Its totient is φ = 3463083720.

The previous prime is 3640220267. The next prime is 3640220293. The reversal of 3640220291 is 1920220463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3640220291 - 2¹⁴ = 3640203907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640220293) 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 7 ways as a sum of consecutive naturals, for example, 993311 + ... + 996968.

It is an arithmetic number, because the mean of its divisors is an integer number (477667200).

Almost surely, 2^3640220291 is an apocalyptic number.

3640220291 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3640220291 is a deficient number, since it is larger than the sum of its proper divisors (181117309).

3640220291 is a wasteful number, since it uses less digits than its factorization.

3640220291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990369.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3640220291 is about 60334.2381322579. The cubic root of 3640220291 is about 1538.3053674376.

The spelling of 3640220291 in words is "three billion, six hundred forty million, two hundred twenty thousand, two hundred ninety-one".