2271778 has 16 divisors (see below), whose sum is σ = 3647160. Its totient is φ = 1057536.

The previous prime is 2271767. The next prime is 2271781. The reversal of 2271778 is 8771722.

2271778 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 1734489 + 537289 = 1317^2 + 733^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a zygodrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400 + ... + 4012.

2^2271778 is an apocalyptic number.

2271778 is a deficient number, since it is larger than the sum of its proper divisors (1375382).

2271778 is a wasteful number, since it uses less digits than its factorization.

2271778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its digits is 10976, while the sum is 34.

The square root of 2271778 is about 1507.2418518605. The cubic root of 2271778 is about 131.4584870914.

The spelling of 2271778 in words is "two million, two hundred seventy-one thousand, seven hundred seventy-eight".