2001334640 has 40 divisors (see below), whose sum is σ = 4766601168. Its totient is φ = 781007360.

The previous prime is 2001334637. The next prime is 2001334663. The reversal of 2001334640 is 464331002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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, 301802 + ... + 308361.

Almost surely, 2^2001334640 is an apocalyptic number.

2001334640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001334640 is an abundant number, since it is smaller than the sum of its proper divisors (2765266528).

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

2001334640 is a wasteful number, since it uses less digits than its factorization.

2001334640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610217 (or 610211 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2001334640 is about 44736.2787902615. The cubic root of 2001334640 is about 1260.2012444160.

Adding to 2001334640 its reverse (464331002), we get a palindrome (2465665642).

The spelling of 2001334640 in words is "two billion, one million, three hundred thirty-four thousand, six hundred forty".