4000807640 has 16 divisors (see below), whose sum is σ = 9001817280. Its totient is φ = 1600323040.

The previous prime is 4000807621. The next prime is 4000807739. The reversal of 4000807640 is 467080004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50010056 + ... + 50010135.

It is an arithmetic number, because the mean of its divisors is an integer number (562613580).

Almost surely, 2^4000807640 is an apocalyptic number.

4000807640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000807640 is an abundant number, since it is smaller than the sum of its proper divisors (5001009640).

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

4000807640 is a wasteful number, since it uses less digits than its factorization.

4000807640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100020202 (or 100020198 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 4000807640 is about 63251.9378359272. The cubic root of 4000807640 is about 1587.5078821606.

Adding to 4000807640 its reverse (467080004), we get a palindrome (4467887644).

The spelling of 4000807640 in words is "four billion, eight hundred seven thousand, six hundred forty".