4001387568 has 40 divisors (see below), whose sum is σ = 10339243008. Its totient is φ = 1333495872.

The previous prime is 4001387561. The next prime is 4001387591. The reversal of 4001387568 is 8657831004.

It is a super-2 number, since 2×4001387568² = 32022204938689909248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4001387561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342105 + ... + 353607.

Almost surely, 2^4001387568 is an apocalyptic number.

4001387568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4001387568 is an abundant number, since it is smaller than the sum of its proper divisors (6337855440).

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

4001387568 is a wasteful number, since it uses less digits than its factorization.

4001387568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18761 (or 18755 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 4001387568 is about 63256.5219404292. The cubic root of 4001387568 is about 1587.5845829899.

The spelling of 4001387568 in words is "four billion, one million, three hundred eighty-seven thousand, five hundred sixty-eight".