2051730 has 80 divisors (see below), whose sum is σ = 5880600. Its totient is φ = 511488.

The previous prime is 2051719. The next prime is 2051743. The reversal of 2051730 is 371502.

It can be written as a sum of positive squares in 4 ways, for example, as 1520289 + 531441 = 1233^2 + 729^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13696 + ... + 13844.

2^2051730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2940300).

2051730 is an abundant number, since it is smaller than the sum of its proper divisors (3828870).

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

2051730 is a wasteful number, since it uses less digits than its factorization.

2051730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 176 counting only the distinct ones).

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

The square root of 2051730 is about 1432.3861211280. The cubic root of 2051730 is about 127.0691338311.

The spelling of 2051730 in words is "two million, fifty-one thousand, seven hundred thirty".