2015812944 has 240 divisors, whose sum is σ = 6250742784. Its totient is φ = 603648000.

The previous prime is 2015812933. The next prime is 2015812957. The reversal of 2015812944 is 4492185102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2015812899 and 2015812908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7664557 + ... + 7664819.

Almost surely, 2^2015812944 is an apocalyptic number.

2015812944 is a gapful number since it is divisible by the number (24) 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 2015812944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3125371392).

2015812944 is an abundant number, since it is smaller than the sum of its proper divisors (4234929840).

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

2015812944 is a wasteful number, since it uses less digits than its factorization.

2015812944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2015812944 is about 44897.8055588466. The cubic root of 2015812944 is about 1263.2328471270.

The spelling of 2015812944 in words is "two billion, fifteen million, eight hundred twelve thousand, nine hundred forty-four".