320428463488 has 128 divisors (see below), whose sum is σ = 754809661440. Its totient is φ = 132591513600.

The previous prime is 320428463479. The next prime is 320428463489. The reversal of 320428463488 is 884364824023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×320428463488² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320428463489) 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, 12291748 + ... + 12317788.

It is an arithmetic number, because the mean of its divisors is an integer number (5896950480).

Almost surely, 2^320428463488 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 320428463488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377404830720).

320428463488 is an abundant number, since it is smaller than the sum of its proper divisors (434381197952).

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

320428463488 is a wasteful number, since it uses less digits than its factorization.

320428463488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26536 (or 26524 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 52.

The spelling of 320428463488 in words is "three hundred twenty billion, four hundred twenty-eight million, four hundred sixty-three thousand, four hundred eighty-eight".