2778734 has 32 divisors (see below), whose sum is σ = 5031936. Its totient is φ = 1126080.

The previous prime is 2778697. The next prime is 2778739. The reversal of 2778734 is 4378772.

It is a d-powerful number, because it can be written as 2¹⁵ + 7⁵ + 7⁷ + 8⁵ + 7⁷ + 3⁶ + 4¹⁰ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26927 + ... + 27029.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2^2778734 is an apocalyptic number.

2778734 is a deficient number, since it is larger than the sum of its proper divisors (2253202).

2778734 is a wasteful number, since it uses less digits than its factorization.

2778734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its digits is 65856, while the sum is 38.

The square root of 2778734 is about 1666.9535086498. The cubic root of 2778734 is about 140.5882392142.

Adding to 2778734 its sum of digits (38), we get a palindrome (2778772).

The spelling of 2778734 in words is "two million, seven hundred seventy-eight thousand, seven hundred thirty-four".