4020015440 has 160 divisors (see below), whose sum is σ = 11733534720. Its totient is φ = 1248901632.

The previous prime is 4020015431. The next prime is 4020015499. The reversal of 4020015440 is 445100204.

4020015440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 236507 + ... + 252933.

It is an arithmetic number, because the mean of its divisors is an integer number (73334592).

Almost surely, 2^4020015440 is an apocalyptic number.

4020015440 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 4020015440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5866767360).

4020015440 is an abundant number, since it is smaller than the sum of its proper divisors (7713519280).

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

4020015440 is a wasteful number, since it uses less digits than its factorization.

4020015440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16489 (or 16483 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4020015440 is about 63403.5916963700. The cubic root of 4020015440 is about 1590.0443588220.

Adding to 4020015440 its reverse (445100204), we get a palindrome (4465115644).

The spelling of 4020015440 in words is "four billion, twenty million, fifteen thousand, four hundred forty".