2081730 has 64 divisors (see below), whose sum is σ = 5971968. Its totient is φ = 454080.

The previous prime is 2081719. The next prime is 2081749. The reversal of 2081730 is 371802.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2081697 and 2081706.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4615 + ... + 5045.

It is an arithmetic number, because the mean of its divisors is an integer number (93312).

2^2081730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2081730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2985984).

2081730 is an abundant number, since it is smaller than the sum of its proper divisors (3890238).

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

2081730 is a wasteful number, since it uses less digits than its factorization.

2081730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 2081730 is about 1442.8201551129. The cubic root of 2081730 is about 127.6854663381.

The spelling of 2081730 in words is "two million, eighty-one thousand, seven hundred thirty".