320423976 has 24 divisors (see below), whose sum is σ = 867815130. Its totient is φ = 106807968.

The previous prime is 320423953. The next prime is 320423977. The reversal of 320423976 is 679324023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 257602500 + 62821476 = 16050^2 + 7926^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 320423976.

It is not an unprimeable number, because it can be changed into a prime (320423977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2225095 + ... + 2225238.

Almost surely, 2^320423976 is an apocalyptic number.

320423976 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

320423976 is an abundant number, since it is smaller than the sum of its proper divisors (547391154).

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

320423976 is a wasteful number, since it uses less digits than its factorization.

320423976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450345 (or 4450338 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 320423976 is about 17900.3903868044. The cubic root of 320423976 is about 684.2923240091.

Adding to 320423976 its reverse (679324023), we get a palindrome (999747999).

The spelling of 320423976 in words is "three hundred twenty million, four hundred twenty-three thousand, nine hundred seventy-six".