2722778 has 4 divisors (see below), whose sum is σ = 4084170. Its totient is φ = 1361388.

The previous prime is 2722751. The next prime is 2722789. The reversal of 2722778 is 8772272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2455489 + 267289 = 1567^2 + 517^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680693 + ... + 680696.

2^2722778 is an apocalyptic number.

2722778 is a deficient number, since it is larger than the sum of its proper divisors (1361392).

2722778 is a wasteful number, since it uses less digits than its factorization.

2722778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361391.

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

The square root of 2722778 is about 1650.0842402738. The cubic root of 2722778 is about 139.6381471708.

The spelling of 2722778 in words is "two million, seven hundred twenty-two thousand, seven hundred seventy-eight".