2015024440 has 128 divisors (see below), whose sum is σ = 5470960320. Its totient is φ = 658022400.

The previous prime is 2015024383. The next prime is 2015024443. The reversal of 2015024440 is 444205102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015024443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206880 + ... + 216400.

Almost surely, 2^2015024440 is an apocalyptic number.

2015024440 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 2015024440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2735480160).

2015024440 is an abundant number, since it is smaller than the sum of its proper divisors (3455935880).

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

2015024440 is a wasteful number, since it uses less digits than its factorization.

2015024440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9593 (or 9589 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2015024440 is about 44889.0236026581. The cubic root of 2015024440 is about 1263.0681172170.

Adding to 2015024440 its reverse (444205102), we get a palindrome (2459229542).

The spelling of 2015024440 in words is "two billion, fifteen million, twenty-four thousand, four hundred forty".