2001386408 has 64 divisors (see below), whose sum is σ = 4345436160. Its totient is φ = 846449856.

The previous prime is 2001386399. The next prime is 2001386417. The reversal of 2001386408 is 8046831002.

It is an interprime number because it is at equal distance from previous prime (2001386399) and next prime (2001386417).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2693285 + ... + 2694027.

It is an arithmetic number, because the mean of its divisors is an integer number (67897440).

Almost surely, 2^2001386408 is an apocalyptic number.

2001386408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001386408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2172718080).

2001386408 is an abundant number, since it is smaller than the sum of its proper divisors (2344049752).

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

2001386408 is a wasteful number, since it uses less digits than its factorization.

2001386408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 2001386408 is about 44736.8573773349. The cubic root of 2001386408 is about 1260.2121100877.

The spelling of 2001386408 in words is "two billion, one million, three hundred eighty-six thousand, four hundred eight".