399073068 has 72 divisors (see below), whose sum is σ = 1053445120. Its totient is φ = 132094800.

The previous prime is 399073061. The next prime is 399073091. The reversal of 399073068 is 860370993.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (399073061) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 145413 + ... + 148131.

Almost surely, 2^399073068 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 399073068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526722560).

399073068 is an abundant number, since it is smaller than the sum of its proper divisors (654372052).

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

399073068 is a wasteful number, since it uses less digits than its factorization.

399073068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 399073068 is about 19976.8132593765. The cubic root of 399073068 is about 736.2367184178.

The spelling of 399073068 in words is "three hundred ninety-nine million, seventy-three thousand, sixty-eight".