2778196 has 6 divisors (see below), whose sum is σ = 4861850. Its totient is φ = 1389096.

The previous prime is 2778173. The next prime is 2778197. The reversal of 2778196 is 6918772.

It can be written as a sum of positive squares in only one way, i.e., 2722500 + 55696 = 1650^2 + 236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347271 + ... + 347278.

2^2778196 is an apocalyptic number.

It is an amenable number.

2778196 is a deficient number, since it is larger than the sum of its proper divisors (2083654).

2778196 is a wasteful number, since it uses less digits than its factorization.

2778196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694553 (or 694551 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 2778196 is about 1666.7921286111. The cubic root of 2778196 is about 140.5791653753.

The spelling of 2778196 in words is "two million, seven hundred seventy-eight thousand, one hundred ninety-six".