320000252440 has 64 divisors (see below), whose sum is σ = 787244832000. Its totient is φ = 116098592640.

The previous prime is 320000252413. The next prime is 320000252441. The reversal of 320000252440 is 44252000023.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320000252441) 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, 635170 + ... + 1021489.

It is an arithmetic number, because the mean of its divisors is an integer number (12300700500).

Almost surely, 2^320000252440 is an apocalyptic number.

It is an amenable number.

320000252440 is an abundant number, since it is smaller than the sum of its proper divisors (467244579560).

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

320000252440 is a wasteful number, since it uses less digits than its factorization.

320000252440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657120 (or 1657116 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 320000252440 its reverse (44252000023), we get a palindrome (364252252463).

The spelling of 320000252440 in words is "three hundred twenty billion, two hundred fifty-two thousand, four hundred forty".