320120540 has 96 divisors (see below), whose sum is σ = 734832000. Its totient is φ = 116695040.

The previous prime is 320120527. The next prime is 320120543. The reversal of 320120540 is 45021023.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320120543) 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, 2148386 + ... + 2148534.

It is an arithmetic number, because the mean of its divisors is an integer number (7654500).

Almost surely, 2^320120540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320120540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367416000).

320120540 is an abundant number, since it is smaller than the sum of its proper divisors (414711460).

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

320120540 is a wasteful number, since it uses less digits than its factorization.

320120540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 320120540 is about 17891.9126981997. The cubic root of 320120540 is about 684.0762514311.

Adding to 320120540 its reverse (45021023), we get a palindrome (365141563).

The spelling of 320120540 in words is "three hundred twenty million, one hundred twenty thousand, five hundred forty".