2989821 has 8 divisors (see below), whose sum is σ = 4196320. Its totient is φ = 1888272.

The previous prime is 2989799. The next prime is 2989823. The reversal of 2989821 is 1289892.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2989821 - 2⁶ = 2989757 is a prime.

It is a super-2 number, since 2×2989821² = 17878059224082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2989821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2989823) 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, 26170 + ... + 26283.

It is an arithmetic number, because the mean of its divisors is an integer number (524540).

2^2989821 is an apocalyptic number.

It is an amenable number.

2989821 is a deficient number, since it is larger than the sum of its proper divisors (1206499).

2989821 is a wasteful number, since it uses less digits than its factorization.

2989821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52475.

The product of its digits is 20736, while the sum is 39.

The square root of 2989821 is about 1729.1098866180. The cubic root of 2989821 is about 144.0616537689.

The spelling of 2989821 in words is "two million, nine hundred eighty-nine thousand, eight hundred twenty-one".