320655643 has 32 divisors (see below), whose sum is σ = 408748032. Its totient is φ = 244327200.

The previous prime is 320655631. The next prime is 320655659. The reversal of 320655643 is 346556023.

It is a cyclic number.

It is not a de Polignac number, because 320655643 - 2⁵ = 320655611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320655599 and 320655608.

It is not an unprimeable number, because it can be changed into a prime (320655623) 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, 837030 + ... + 837412.

It is an arithmetic number, because the mean of its divisors is an integer number (12773376).

Almost surely, 2^320655643 is an apocalyptic number.

320655643 is a deficient number, since it is larger than the sum of its proper divisors (88092389).

320655643 is a wasteful number, since it uses less digits than its factorization.

320655643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 320655643 is about 17906.8602217139. The cubic root of 320655643 is about 684.4571990619.

The spelling of 320655643 in words is "three hundred twenty million, six hundred fifty-five thousand, six hundred forty-three".