2278394 has 4 divisors (see below), whose sum is σ = 3417594. Its totient is φ = 1139196.

The previous prime is 2278379. The next prime is 2278421. The reversal of 2278394 is 4938722.

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., 1530169 + 748225 = 1237^2 + 865^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569597 + ... + 569600.

2^2278394 is an apocalyptic number.

2278394 is a deficient number, since it is larger than the sum of its proper divisors (1139200).

2278394 is a wasteful number, since it uses less digits than its factorization.

2278394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139199.

The product of its digits is 24192, while the sum is 35.

The square root of 2278394 is about 1509.4349936317. The cubic root of 2278394 is about 131.5859770167.

The spelling of 2278394 in words is "two million, two hundred seventy-eight thousand, three hundred ninety-four".