2838778 has 4 divisors (see below), whose sum is σ = 4258170. Its totient is φ = 1419388.

The previous prime is 2838769. The next prime is 2838827. The reversal of 2838778 is 8778382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8778382 = 2 ⋅4389191.

It can be written as a sum of positive squares in only one way, i.e., 2550409 + 288369 = 1597^2 + 537^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 709693 + ... + 709696.

2^2838778 is an apocalyptic number.

2838778 is a deficient number, since it is larger than the sum of its proper divisors (1419392).

2838778 is a wasteful number, since it uses less digits than its factorization.

2838778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419391.

The product of its digits is 150528, while the sum is 43.

The square root of 2838778 is about 1684.8673538294. The cubic root of 2838778 is about 141.5936608076.

The spelling of 2838778 in words is "two million, eight hundred thirty-eight thousand, seven hundred seventy-eight".