320121376 has 48 divisors (see below), whose sum is σ = 653280768. Its totient is φ = 154252800.

The previous prime is 320121353. The next prime is 320121391. The reversal of 320121376 is 673121023.

It is a self number, because there is not a number n which added to its sum of digits gives 320121376.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309981 + ... + 311011.

It is an arithmetic number, because the mean of its divisors is an integer number (13610016).

Almost surely, 2^320121376 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 320121376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326640384).

320121376 is an abundant number, since it is smaller than the sum of its proper divisors (333159392).

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

320121376 is a wasteful number, since it uses less digits than its factorization.

320121376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 320121376 is about 17891.9360606951. The cubic root of 320121376 is about 684.0768469227.

Adding to 320121376 its reverse (673121023), we get a palindrome (993242399).

The spelling of 320121376 in words is "three hundred twenty million, one hundred twenty-one thousand, three hundred seventy-six".