399850340 has 12 divisors (see below), whose sum is σ = 839685756. Its totient is φ = 159940128.

The previous prime is 399850277. The next prime is 399850343. The reversal of 399850340 is 43058993.

It can be written as a sum of positive squares in 2 ways, for example, as 285745216 + 114105124 = 16904^2 + 10682^2 .

It is not an unprimeable number, because it can be changed into a prime (399850343) 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 3 ways as a sum of consecutive naturals, for example, 9996239 + ... + 9996278.

It is an arithmetic number, because the mean of its divisors is an integer number (69973813).

Almost surely, 2^399850340 is an apocalyptic number.

It is an amenable number.

399850340 is an abundant number, since it is smaller than the sum of its proper divisors (439835416).

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

399850340 is a wasteful number, since it uses less digits than its factorization.

399850340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19992526 (or 19992524 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 399850340 is about 19996.2581499640. The cubic root of 399850340 is about 736.7143962395.

The spelling of 399850340 in words is "three hundred ninety-nine million, eight hundred fifty thousand, three hundred forty".