2820935989 has 4 divisors (see below), whose sum is σ = 2821334400. Its totient is φ = 2820537580.

The previous prime is 2820935977. The next prime is 2820936011. The reversal of 2820935989 is 9895390282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2820935989 - 2¹⁹ = 2820411701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820933989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188389 + ... + 202810.

It is an arithmetic number, because the mean of its divisors is an integer number (705333600).

Almost surely, 2^2820935989 is an apocalyptic number.

It is an amenable number.

2820935989 is a deficient number, since it is larger than the sum of its proper divisors (398411).

2820935989 is an equidigital number, since it uses as much as digits as its factorization.

2820935989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398410.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The square root of 2820935989 is about 53112.4843045399. The cubic root of 2820935989 is about 1412.9639358798.

The spelling of 2820935989 in words is "two billion, eight hundred twenty million, nine hundred thirty-five thousand, nine hundred eighty-nine".