399720170598 has 96 divisors (see below), whose sum is σ = 956700124128. Its totient is φ = 110932416000.

The previous prime is 399720170569. The next prime is 399720170609. The reversal of 399720170598 is 895071027993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6507108 + ... + 6568248.

It is an arithmetic number, because the mean of its divisors is an integer number (9965626293).

Almost surely, 2^399720170598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399720170598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478350062064).

399720170598 is an abundant number, since it is smaller than the sum of its proper divisors (556979953530).

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

399720170598 is a wasteful number, since it uses less digits than its factorization.

399720170598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61798 (or 61791 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 60.

The spelling of 399720170598 in words is "three hundred ninety-nine billion, seven hundred twenty million, one hundred seventy thousand, five hundred ninety-eight".