320423004 has 108 divisors (see below), whose sum is σ = 942872112. Its totient is φ = 91365120.

The previous prime is 320422981. The next prime is 320423023. The reversal of 320423004 is 400324023.

320423004 is a `hidden beast` number, since 320 + 42 + 300 + 4 = 666.

It is a super-3 number, since 3×320423004³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 71889 + ... + 76215.

Almost surely, 2^320423004 is an apocalyptic number.

320423004 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320423004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471436056).

320423004 is an abundant number, since it is smaller than the sum of its proper divisors (622449108).

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

320423004 is a wasteful number, since it uses less digits than its factorization.

320423004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376 (or 4360 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 320423004 is about 17900.3632365380. The cubic root of 320423004 is about 684.2916320792.

Adding to 320423004 its reverse (400324023), we get a palindrome (720747027).

It can be divided in two parts, 320 and 423004, that added together give a palindrome (423324).

The spelling of 320423004 in words is "three hundred twenty million, four hundred twenty-three thousand, four".