2778741 has 18 divisors (see below), whose sum is σ = 4669782. Its totient is φ = 1587600.

The previous prime is 2778739. The next prime is 2778779. The reversal of 2778741 is 1478772.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 298116 = 1575^2 + 546^2 .

It is not a de Polignac number, because 2778741 - 2¹ = 2778739 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2778696 and 2778705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778241) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2710 + ... + 3591.

2^2778741 is an apocalyptic number.

2778741 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2778741 is a deficient number, since it is larger than the sum of its proper divisors (1891041).

2778741 is a wasteful number, since it uses less digits than its factorization.

2778741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321 (or 6311 counting only the distinct ones).

The product of its digits is 21952, while the sum is 36.

The square root of 2778741 is about 1666.9556082872. The cubic root of 2778741 is about 140.5883572676.

The spelling of 2778741 in words is "two million, seven hundred seventy-eight thousand, seven hundred forty-one".