399227808 has 96 divisors (see below), whose sum is σ = 1215696384. Its totient is φ = 112349952.

The previous prime is 399227797. The next prime is 399227831. The reversal of 399227808 is 808722993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40591 + ... + 49457.

It is an arithmetic number, because the mean of its divisors is an integer number (12663504).

Almost surely, 2^399227808 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 399227808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607848192).

399227808 is an abundant number, since it is smaller than the sum of its proper divisors (816468576).

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

399227808 is a wasteful number, since it uses less digits than its factorization.

399227808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8954 (or 8946 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 399227808 is about 19980.6858741135. The cubic root of 399227808 is about 736.3318643592.

The spelling of 399227808 in words is "three hundred ninety-nine million, two hundred twenty-seven thousand, eight hundred eight".