312001808 has 40 divisors (see below), whose sum is σ = 645488448. Its totient is φ = 145740672.

The previous prime is 312001777. The next prime is 312001817. The reversal of 312001808 is 808100213.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5966 + ... + 25682.

Almost surely, 2^312001808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312001808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322744224).

312001808 is an abundant number, since it is smaller than the sum of its proper divisors (333486640).

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

312001808 is a wasteful number, since it uses less digits than its factorization.

312001808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19791 (or 19785 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 312001808 is about 17663.5729115035. The cubic root of 312001808 is about 678.2435987093.

The spelling of 312001808 in words is "three hundred twelve million, one thousand, eight hundred eight".