2015440320 has 224 divisors, whose sum is σ = 6860487168. Its totient is φ = 499986432.

The previous prime is 2015440319. The next prime is 2015440331. The reversal of 2015440320 is 230445102.

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, 815727 + ... + 818193.

Almost surely, 2^2015440320 is an apocalyptic number.

2015440320 is a gapful number since it is divisible by the number (20) 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 2015440320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3430243584).

2015440320 is an abundant number, since it is smaller than the sum of its proper divisors (4845046848).

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

2015440320 is a wasteful number, since it uses less digits than its factorization.

2015440320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2015440320 is about 44893.6556764984. The cubic root of 2015440320 is about 1263.1550059291.

Adding to 2015440320 its reverse (230445102), we get a palindrome (2245885422).

The spelling of 2015440320 in words is "two billion, fifteen million, four hundred forty thousand, three hundred twenty".