2821730 has 16 divisors (see below), whose sum is σ = 5133240. Its totient is φ = 1116672.

The previous prime is 2821717. The next prime is 2821733. The reversal of 2821730 is 371282.

It can be written as a sum of positive squares in 4 ways, for example, as 2601769 + 219961 = 1613^2 + 469^2 .

It is a super-3 number, since 3×2821730³ = 67401198843335151000, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2821696 and 2821705.

It is not an unprimeable number, because it can be changed into a prime (2821733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485 + ... + 2424.

2^2821730 is an apocalyptic number.

2821730 is a deficient number, since it is larger than the sum of its proper divisors (2311510).

2821730 is a wasteful number, since it uses less digits than its factorization.

2821730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2821730 is about 1679.8005834027. The cubic root of 2821730 is about 141.3096492788.

The spelling of 2821730 in words is "two million, eight hundred twenty-one thousand, seven hundred thirty".