399823004 has 48 divisors (see below), whose sum is σ = 848305920. Its totient is φ = 161066880.

The previous prime is 399823003. The next prime is 399823013. The reversal of 399823004 is 400328993.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399823003) 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, 66824 + ... + 72560.

It is an arithmetic number, because the mean of its divisors is an integer number (17673040).

Almost surely, 2^399823004 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 399823004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424152960).

399823004 is an abundant number, since it is smaller than the sum of its proper divisors (448482916).

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

399823004 is a wasteful number, since it uses less digits than its factorization.

399823004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898 (or 5896 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 399823004 is about 19995.5746103982. The cubic root of 399823004 is about 736.6976072215.

The spelling of 399823004 in words is "three hundred ninety-nine million, eight hundred twenty-three thousand, four".