2781026 has 8 divisors (see below), whose sum is σ = 4210140. Its totient is φ = 1377648.

The previous prime is 2781019. The next prime is 2781029. The reversal of 2781026 is 6201872.

It can be written as a sum of positive squares in 2 ways, for example, as 2725801 + 55225 = 1651^2 + 235^2 .

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

It is a super-2 number, since 2×2781026² = 15468211225352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2780986 and 2781004.

It is not an unprimeable number, because it can be changed into a prime (2781029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6161 + ... + 6596.

2^2781026 is an apocalyptic number.

2781026 is a deficient number, since it is larger than the sum of its proper divisors (1429114).

2781026 is a wasteful number, since it uses less digits than its factorization.

2781026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12868.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2781026 is about 1667.6408486242. The cubic root of 2781026 is about 140.6268826744.

Adding to 2781026 its reverse (6201872), we get a palindrome (8982898).

The spelling of 2781026 in words is "two million, seven hundred eighty-one thousand, twenty-six".