2798381 has 2 divisors, whose sum is σ = 2798382. Its totient is φ = 2798380.

The previous prime is 2798363. The next prime is 2798437. The reversal of 2798381 is 1838972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 1069156 = 1315^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 2798381 - 2⁶ = 2798317 is a prime.

It is a super-2 number, since 2×2798381² = 15661872442322, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2798321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1399190 + 1399191.

It is an arithmetic number, because the mean of its divisors is an integer number (1399191).

2^2798381 is an apocalyptic number.

It is an amenable number.

2798381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2798381 is an equidigital number, since it uses as much as digits as its factorization.

2798381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 2798381 is about 1672.8362143378. The cubic root of 2798381 is about 140.9188037451.

The spelling of 2798381 in words is "two million, seven hundred ninety-eight thousand, three hundred eighty-one".