320415623 has 8 divisors (see below), whose sum is σ = 352434576. Its totient is φ = 291285720.

The previous prime is 320415619. The next prime is 320415631. The reversal of 320415623 is 326514023.

It is not a de Polignac number, because 320415623 - 2² = 320415619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320415592 and 320415601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320415653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119036 + ... + 121697.

It is an arithmetic number, because the mean of its divisors is an integer number (44054322).

Almost surely, 2^320415623 is an apocalyptic number.

320415623 is a deficient number, since it is larger than the sum of its proper divisors (32018953).

320415623 is an equidigital number, since it uses as much as digits as its factorization.

320415623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240766 (or 240744 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 320415623 is about 17900.1570663500. The cubic root of 320415623 is about 684.2863777796.

Adding to 320415623 its reverse (326514023), we get a palindrome (646929646).

The spelling of 320415623 in words is "three hundred twenty million, four hundred fifteen thousand, six hundred twenty-three".