320278448 has 80 divisors (see below), whose sum is σ = 736429056. Its totient is φ = 132088320.

The previous prime is 320278447. The next prime is 320278451. The reversal of 320278448 is 844872023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320278447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351113 + ... + 352023.

Almost surely, 2^320278448 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 320278448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368214528).

320278448 is an abundant number, since it is smaller than the sum of its proper divisors (416150608).

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

320278448 is a wasteful number, since it uses less digits than its factorization.

320278448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 320278448 is about 17896.3249858735. The cubic root of 320278448 is about 684.1887125644.

The spelling of 320278448 in words is "three hundred twenty million, two hundred seventy-eight thousand, four hundred forty-eight".