2790981 has 24 divisors (see below), whose sum is σ = 4280640. Its totient is φ = 1748736.

The previous prime is 2790979. The next prime is 2791007. The reversal of 2790981 is 1890972.

It is a happy number.

It is not a de Polignac number, because 2790981 - 2¹ = 2790979 is a prime.

It is a super-2 number, since 2×2790981² = 15579149884722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2790901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20010 + ... + 20148.

It is an arithmetic number, because the mean of its divisors is an integer number (178360).

2^2790981 is an apocalyptic number.

It is an amenable number.

2790981 is a deficient number, since it is larger than the sum of its proper divisors (1489659).

2790981 is a wasteful number, since it uses less digits than its factorization.

2790981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2790981 is about 1670.6229377092. The cubic root of 2790981 is about 140.7944795152.

Subtracting from 2790981 its reverse (1890972), we obtain a palindrome (900009).

The spelling of 2790981 in words is "two million, seven hundred ninety thousand, nine hundred eighty-one".