399616600 has 96 divisors (see below), whose sum is σ = 954671040. Its totient is φ = 155520000.

The previous prime is 399616589. The next prime is 399616601. The reversal of 399616600 is 6616993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399616601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1474465 + ... + 1474735.

It is an arithmetic number, because the mean of its divisors is an integer number (9944490).

Almost surely, 2^399616600 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 399616600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477335520).

399616600 is an abundant number, since it is smaller than the sum of its proper divisors (555054440).

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

399616600 is a wasteful number, since it uses less digits than its factorization.

399616600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 399616600 is about 19990.4127020930. The cubic root of 399616600 is about 736.5708148619.

The spelling of 399616600 in words is "three hundred ninety-nine million, six hundred sixteen thousand, six hundred".