399296 has 28 divisors (see below), whose sum is σ = 841248. Its totient is φ = 187392.

The previous prime is 399283. The next prime is 399353. The reversal of 399296 is 692993.

It is a congruent number.

It is an unprimeable number.

399296 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905 + ... + 1271.

2³⁹⁹²⁹⁶ 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 399296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420624).

399296 is an abundant number, since it is smaller than the sum of its proper divisors (441952).

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

399296 is a wasteful number, since it uses less digits than its factorization.

399296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 386 counting only the distinct ones).

The product of its digits is 26244, while the sum is 38.

The square root of 399296 is about 631.8987260630. The cubic root of 399296 is about 73.6373786192.

It can be divided in two parts, 3 and 99296, that added together give a palindrome (99299).

The spelling of 399296 in words is "three hundred ninety-nine thousand, two hundred ninety-six".