399360500 has 288 divisors, whose sum is σ = 1171183104. Its totient is φ = 116160000.

The previous prime is 399360497. The next prime is 399360509. The reversal of 399360500 is 5063993.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399360509) 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 95 ways as a sum of consecutive naturals, for example, 9740480 + ... + 9740520.

It is an arithmetic number, because the mean of its divisors is an integer number (4066608).

Almost surely, 2^399360500 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 399360500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585591552).

399360500 is an abundant number, since it is smaller than the sum of its proper divisors (771822604).

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

399360500 is a wasteful number, since it uses less digits than its factorization.

399360500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 399360500 is about 19984.0061048830. The cubic root of 399360500 is about 736.4134339317.

The spelling of 399360500 in words is "three hundred ninety-nine million, three hundred sixty thousand, five hundred".