4020320340 has 72 divisors (see below), whose sum is σ = 12202805160. Its totient is φ = 1071396864.

The previous prime is 4020320329. The next prime is 4020320347. The reversal of 4020320340 is 430230204.

4020320340 is a `hidden beast` number, since 4 + 0 + 2 + 0 + 320 + 340 = 666.

4020320340 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1562937156 + 2457383184 = 39534^2 + 49572^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020320347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313576 + ... + 326144.

It is an arithmetic number, because the mean of its divisors is an integer number (169483405).

Almost surely, 2^4020320340 is an apocalyptic number.

It is an amenable number.

4020320340 is an abundant number, since it is smaller than the sum of its proper divisors (8182484820).

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

4020320340 is a wasteful number, since it uses less digits than its factorization.

4020320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14361 (or 14356 counting only the distinct ones).

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

The square root of 4020320340 is about 63405.9960886981. The cubic root of 4020320340 is about 1590.0845570316.

Adding to 4020320340 its reverse (430230204), we get a palindrome (4450550544).

The spelling of 4020320340 in words is "four billion, twenty million, three hundred twenty thousand, three hundred forty".