2015730 has 24 divisors (see below), whose sum is σ = 5241132. Its totient is φ = 537504.

The previous prime is 2015701. The next prime is 2015731. The reversal of 2015730 is 375102.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 103041 = 1383^2 + 321^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2015731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11109 + ... + 11288.

2^2015730 is an apocalyptic number.

2015730 is an abundant number, since it is smaller than the sum of its proper divisors (3225402).

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

2015730 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 2015730 = (3712050)₉.

2015730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22410 (or 22407 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 2015730 is about 1419.7640649066. The cubic root of 2015730 is about 126.3215520946.

The spelling of 2015730 in words is "two million, fifteen thousand, seven hundred thirty".