4001808 has 40 divisors (see below), whose sum is σ = 10410048. Its totient is φ = 1324672.

The previous prime is 4001807. The next prime is 4001827. The reversal of 4001808 is 8081004.

It is not an unprimeable number, because it can be changed into a prime (4001807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12466 + ... + 12782.

Almost surely, 2^4001808 is an apocalyptic number.

4001808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4001808 is an abundant number, since it is smaller than the sum of its proper divisors (6408240).

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

4001808 is a wasteful number, since it uses less digits than its factorization.

4001808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 4001808 is about 2000.4519489355. The cubic root of 4001808 is about 158.7640184368.

The spelling of 4001808 in words is "four million, one thousand, eight hundred eight".