320641443 has 32 divisors (see below), whose sum is σ = 491339520. Its totient is φ = 206521920.

The previous prime is 320641439. The next prime is 320641481. The reversal of 320641443 is 344146023.

320641443 is a `hidden beast` number, since 3 + 206 + 414 + 43 = 666.

It is not a de Polignac number, because 320641443 - 2² = 320641439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (320641423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117096 + ... + 119802.

It is an arithmetic number, because the mean of its divisors is an integer number (15354360).

Almost surely, 2^320641443 is an apocalyptic number.

320641443 is a deficient number, since it is larger than the sum of its proper divisors (170698077).

320641443 is a wasteful number, since it uses less digits than its factorization.

320641443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864 (or 2858 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 320641443 is about 17906.4637212376. The cubic root of 320641443 is about 684.4470953510.

Adding to 320641443 its reverse (344146023), we get a palindrome (664787466).

The spelling of 320641443 in words is "three hundred twenty million, six hundred forty-one thousand, four hundred forty-three".