399804606 has 64 divisors (see below), whose sum is σ = 943695360. Its totient is φ = 125032320.

The previous prime is 399804547. The next prime is 399804617. The reversal of 399804606 is 606408993.

399804606 is a `hidden beast` number, since 39 + 9 + 8 + 0 + 4 + 606 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 450295 + ... + 451181.

It is an arithmetic number, because the mean of its divisors is an integer number (14745240).

Almost surely, 2^399804606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399804606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471847680).

399804606 is an abundant number, since it is smaller than the sum of its proper divisors (543890754).

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

399804606 is a wasteful number, since it uses less digits than its factorization.

399804606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 399804606 is about 19995.1145533103. The cubic root of 399804606 is about 736.6863072460.

The spelling of 399804606 in words is "three hundred ninety-nine million, eight hundred four thousand, six hundred six".