320387976 has 144 divisors (see below), whose sum is σ = 946632960. Its totient is φ = 97606080.

The previous prime is 320387941. The next prime is 320388011. The reversal of 320387976 is 679783023.

It is a happy number.

320387976 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (320387941) and next prime (320388011).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4055505 + ... + 4055583.

It is an arithmetic number, because the mean of its divisors is an integer number (6573840).

Almost surely, 2^320387976 is an apocalyptic number.

320387976 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 320387976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473316480).

320387976 is an abundant number, since it is smaller than the sum of its proper divisors (626244984).

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

320387976 is a wasteful number, since it uses less digits than its factorization.

320387976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 320387976 is about 17899.3847938972. The cubic root of 320387976 is about 684.2666960410.

The spelling of 320387976 in words is "three hundred twenty million, three hundred eighty-seven thousand, nine hundred seventy-six".