399197106 has 256 divisors, whose sum is σ = 1209139200. Its totient is φ = 94478400.

The previous prime is 399197101. The next prime is 399197119. The reversal of 399197106 is 601791993.

399197106 = 434² + 435² + ... + 1085².

It is not an unprimeable number, because it can be changed into a prime (399197101) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2448981 + ... + 2449143.

It is an arithmetic number, because the mean of its divisors is an integer number (4723200).

Almost surely, 2^399197106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399197106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604569600).

399197106 is an abundant number, since it is smaller than the sum of its proper divisors (809942094).

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

399197106 is a wasteful number, since it uses less digits than its factorization.

399197106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 399197106 is about 19979.9175673975. The cubic root of 399197106 is about 736.3129883858.

The spelling of 399197106 in words is "three hundred ninety-nine million, one hundred ninety-seven thousand, one hundred six".