320740020 has 96 divisors (see below), whose sum is σ = 1056585600. Its totient is φ = 80497152.

The previous prime is 320740001. The next prime is 320740067. The reversal of 320740020 is 20047023.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 320739975 and 320740002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8290 + ... + 26649.

It is an arithmetic number, because the mean of its divisors is an integer number (11006100).

Almost surely, 2^320740020 is an apocalyptic number.

320740020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320740020 is an abundant number, since it is smaller than the sum of its proper divisors (735845580).

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

320740020 is a wasteful number, since it uses less digits than its factorization.

320740020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34974 (or 34966 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 320740020 is about 17909.2160632452. The cubic root of 320740020 is about 684.5172295873.

Adding to 320740020 its reverse (20047023), we get a palindrome (340787043).

The spelling of 320740020 in words is "three hundred twenty million, seven hundred forty thousand, twenty".