320423007400 has 96 divisors (see below), whose sum is σ = 791615549880. Its totient is φ = 120200192000.

The previous prime is 320423007379. The next prime is 320423007419. The reversal of 320423007400 is 4700324023.

It can be written as a sum of positive squares in 12 ways, for example, as 2996686564 + 317426320836 = 54742^2 + 563406^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787710 + ... + 1123090.

Almost surely, 2^320423007400 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 320423007400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395807774940).

320423007400 is an abundant number, since it is smaller than the sum of its proper divisors (471192542480).

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

320423007400 is a wasteful number, since it uses less digits than its factorization.

320423007400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335695 (or 335686 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 25.

The spelling of 320423007400 in words is "three hundred twenty billion, four hundred twenty-three million, seven thousand, four hundred".