4418378 has 4 divisors (see below), whose sum is σ = 6627570. Its totient is φ = 2209188.

The previous prime is 4418357. The next prime is 4418389. The reversal of 4418378 is 8738144.

It is a happy number.

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., 4255969 + 162409 = 2063^2 + 403^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104593 + ... + 1104596.

Almost surely, 2^4418378 is an apocalyptic number.

4418378 is a deficient number, since it is larger than the sum of its proper divisors (2209192).

4418378 is a wasteful number, since it uses less digits than its factorization.

4418378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209191.

The product of its digits is 21504, while the sum is 35.

The square root of 4418378 is about 2101.9938154048. The cubic root of 4418378 is about 164.0920809488.

The spelling of 4418378 in words is "four million, four hundred eighteen thousand, three hundred seventy-eight".