2781098 has 16 divisors (see below), whose sum is σ = 4453704. Its totient is φ = 1297920.

The previous prime is 2781089. The next prime is 2781109. The reversal of 2781098 is 8901872.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2229049 + 552049 = 1493^2 + 743^2 .

It is a super-3 number, since 3×2781098³ = 64531258216983339576, which contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5078 + ... + 5598.

2^2781098 is an apocalyptic number.

2781098 is a deficient number, since it is larger than the sum of its proper divisors (1672606).

2781098 is a wasteful number, since it uses less digits than its factorization.

2781098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2781098 is about 1667.6624358664. The cubic root of 2781098 is about 140.6280962610.

The spelling of 2781098 in words is "two million, seven hundred eighty-one thousand, ninety-eight".