4020452340 has 48 divisors (see below), whose sum is σ = 11448077760. Its totient is φ = 1053948160.

The previous prime is 4020452339. The next prime is 4020452353. The reversal of 4020452340 is 432540204.

It is a super-2 number, since 2×4020452340² = 32328074036422951200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4020452340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564321 + ... + 571400.

It is an arithmetic number, because the mean of its divisors is an integer number (238501620).

Almost surely, 2^4020452340 is an apocalyptic number.

It is an amenable number.

4020452340 is an abundant number, since it is smaller than the sum of its proper divisors (7427625420).

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

4020452340 is a wasteful number, since it uses less digits than its factorization.

4020452340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135792 (or 1135790 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 4020452340 is about 63407.0369911731. The cubic root of 4020452340 is about 1590.1019593649.

Adding to 4020452340 its reverse (432540204), we get a palindrome (4452992544).

The spelling of 4020452340 in words is "four billion, twenty million, four hundred fifty-two thousand, three hundred forty".