2818981 has 8 divisors (see below), whose sum is σ = 3090528. Its totient is φ = 2550000.

The previous prime is 2818967. The next prime is 2818987. The reversal of 2818981 is 1898182.

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

It is a cyclic number.

It is not a de Polignac number, because 2818981 - 2⁷ = 2818853 is a prime.

It is a super-2 number, since 2×2818981² = 15893307756722, 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 2818981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2818987) 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, 2251 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (386316).

2^2818981 is an apocalyptic number.

It is an amenable number.

2818981 is a deficient number, since it is larger than the sum of its proper divisors (271547).

2818981 is a wasteful number, since it uses less digits than its factorization.

2818981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283.

The product of its digits is 9216, while the sum is 37.

The square root of 2818981 is about 1678.9821321265. The cubic root of 2818981 is about 141.2637452361.

The spelling of 2818981 in words is "two million, eight hundred eighteen thousand, nine hundred eighty-one".