2820394 has 4 divisors (see below), whose sum is σ = 4230594. Its totient is φ = 1410196.

The previous prime is 2820383. The next prime is 2820401. The reversal of 2820394 is 4930282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2679769 + 140625 = 1637^2 + 375^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 705097 + ... + 705100.

2^2820394 is an apocalyptic number.

2820394 is a deficient number, since it is larger than the sum of its proper divisors (1410200).

2820394 is a wasteful number, since it uses less digits than its factorization.

2820394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410199.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2820394 is about 1679.4028700702. The cubic root of 2820394 is about 141.2873438735.

The spelling of 2820394 in words is "two million, eight hundred twenty thousand, three hundred ninety-four".