2015865072 has 120 divisors (see below), whose sum is σ = 6093991904. Its totient is φ = 618388992.

The previous prime is 2015865053. The next prime is 2015865077. The reversal of 2015865072 is 2705685102.

It is a happy number.

2015865072 is a `hidden beast` number, since 2 + 0 + 1 + 586 + 5 + 0 + 72 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015865077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 696813 + ... + 699699.

Almost surely, 2^2015865072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2015865072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3046995952).

2015865072 is an abundant number, since it is smaller than the sum of its proper divisors (4078126832).

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

2015865072 is a wasteful number, since it uses less digits than its factorization.

2015865072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287 (or 3278 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2015865072 is about 44898.3860734437. The cubic root of 2015865072 is about 1263.2437359075.

The spelling of 2015865072 in words is "two billion, fifteen million, eight hundred sixty-five thousand, seventy-two".