399511296 has 108 divisors (see below), whose sum is σ = 1157635752. Its totient is φ = 132507648.

The previous prime is 399511267. The next prime is 399511303. The reversal of 399511296 is 692115993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 730095 + ... + 730641.

Almost surely, 2^399511296 is an apocalyptic number.

399511296 is a gapful number since it is divisible by the number (36) 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 399511296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578817876).

399511296 is an abundant number, since it is smaller than the sum of its proper divisors (758124456).

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

399511296 is a wasteful number, since it uses less digits than its factorization.

399511296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 869 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 399511296 is about 19987.7786659749. The cubic root of 399511296 is about 736.5061106203.

The spelling of 399511296 in words is "three hundred ninety-nine million, five hundred eleven thousand, two hundred ninety-six".