399083646 has 32 divisors (see below), whose sum is σ = 887298048. Its totient is φ = 118833120.

The previous prime is 399083639. The next prime is 399083647. The reversal of 399083646 is 646380993.

It is a junction number, because it is equal to n+sod(n) for n = 399083595 and 399083604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399083647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80106 + ... + 84941.

It is an arithmetic number, because the mean of its divisors is an integer number (27728064).

Almost surely, 2^399083646 is an apocalyptic number.

399083646 is an abundant number, since it is smaller than the sum of its proper divisors (488214402).

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

399083646 is a wasteful number, since it uses less digits than its factorization.

399083646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165096.

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 399083646 is about 19977.0780145646. The cubic root of 399083646 is about 736.2432233612.

The spelling of 399083646 in words is "three hundred ninety-nine million, eighty-three thousand, six hundred forty-six".