2047778 has 8 divisors (see below), whose sum is σ = 3078300. Its totient is φ = 1021680.

The previous prime is 2047741. The next prime is 2047781. The reversal of 2047778 is 8777402.

It can be written as a sum of positive squares in 2 ways, for example, as 2036329 + 11449 = 1427^2 + 107^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 548 + ... + 2096.

2^2047778 is an apocalyptic number.

2047778 is a deficient number, since it is larger than the sum of its proper divisors (1030522).

2047778 is a wasteful number, since it uses less digits than its factorization.

2047778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 2047778 is about 1431.0059398898. The cubic root of 2047778 is about 126.9874954105.

The spelling of 2047778 in words is "two million, forty-seven thousand, seven hundred seventy-eight".