399320700 has 72 divisors (see below), whose sum is σ = 1166675328. Its totient is φ = 105443520.

The previous prime is 399320693. The next prime is 399320711. The reversal of 399320700 is 7023993.

It is a congruent number.

It is an unprimeable number.

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, 24439 + ... + 37361.

It is an arithmetic number, because the mean of its divisors is an integer number (16203824).

Almost surely, 2^399320700 is an apocalyptic number.

399320700 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399320700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583337664).

399320700 is an abundant number, since it is smaller than the sum of its proper divisors (767354628).

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

399320700 is a wasteful number, since it uses less digits than its factorization.

399320700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043 (or 13036 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 399320700 is about 19983.0102837385. The cubic root of 399320700 is about 736.3889696291.

The spelling of 399320700 in words is "three hundred ninety-nine million, three hundred twenty thousand, seven hundred".