399199500 has 576 divisors, whose sum is σ = 1635379200. Its totient is φ = 79833600.

The previous prime is 399199483. The next prime is 399199543. The reversal of 399199500 is 5991993.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13765486 + ... + 13765514.

It is an arithmetic number, because the mean of its divisors is an integer number (2839200).

Almost surely, 2^399199500 is an apocalyptic number.

399199500 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 399199500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817689600).

399199500 is an abundant number, since it is smaller than the sum of its proper divisors (1236179700).

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

399199500 is a wasteful number, since it uses less digits than its factorization.

399199500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 98415, while the sum is 45.

The square root of 399199500 is about 19979.9774774648. The cubic root of 399199500 is about 736.3144602817.

The spelling of 399199500 in words is "three hundred ninety-nine million, one hundred ninety-nine thousand, five hundred".