320400044 has 6 divisors (see below), whose sum is σ = 560700084. Its totient is φ = 160200020.

The previous prime is 320400043. The next prime is 320400049. The reversal of 320400044 is 440004023.

It is a junction number, because it is equal to n+sod(n) for n = 320399995 and 320400031.

It is not an unprimeable number, because it can be changed into a prime (320400043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40050002 + ... + 40050009.

It is an arithmetic number, because the mean of its divisors is an integer number (93450014).

Almost surely, 2^320400044 is an apocalyptic number.

It is an amenable number.

320400044 is a deficient number, since it is larger than the sum of its proper divisors (240300040).

320400044 is a wasteful number, since it uses less digits than its factorization.

320400044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80100015 (or 80100013 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 320400044 is about 17899.7218972810. The cubic root of 320400044 is about 684.2752873193.

Adding to 320400044 its reverse (440004023), we get a palindrome (760404067).

The spelling of 320400044 in words is "three hundred twenty million, four hundred thousand, forty-four".