2015720 has 64 divisors (see below), whose sum is σ = 5425920. Its totient is φ = 658944.

The previous prime is 2015701. The next prime is 2015731. The reversal of 2015720 is 275102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6284 + ... + 6596.

It is an arithmetic number, because the mean of its divisors is an integer number (84780).

2^2015720 is an apocalyptic number.

2015720 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 2015720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2712960).

2015720 is an abundant number, since it is smaller than the sum of its proper divisors (3410200).

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

2015720 is a wasteful number, since it uses less digits than its factorization.

2015720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 2015720 is about 1419.7605431903. The cubic root of 2015720 is about 126.3213432012.

The spelling of 2015720 in words is "two million, fifteen thousand, seven hundred twenty".