4020115720 has 128 divisors (see below), whose sum is σ = 9951724800. Its totient is φ = 1456559104.

The previous prime is 4020115717. The next prime is 4020115753. The reversal of 4020115720 is 275110204.

It is a happy number.

4020115720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×4020115720² = 32322660804382236800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4020115691 and 4020115700.

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, 1412619 + ... + 1415461.

It is an arithmetic number, because the mean of its divisors is an integer number (77747850).

Almost surely, 2^4020115720 is an apocalyptic number.

4020115720 is a gapful number since it is divisible by the number (40) 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 4020115720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4975862400).

4020115720 is an abundant number, since it is smaller than the sum of its proper divisors (5931609080).

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

4020115720 is a wasteful number, since it uses less digits than its factorization.

4020115720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959 (or 2955 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 4020115720 is about 63404.3824983731. The cubic root of 4020115720 is about 1590.0575800252.

Adding to 4020115720 its reverse (275110204), we get a palindrome (4295225924).

The spelling of 4020115720 in words is "four billion, twenty million, one hundred fifteen thousand, seven hundred twenty".