4222378 has 4 divisors (see below), whose sum is σ = 6333570. Its totient is φ = 2111188.

The previous prime is 4222373. The next prime is 4222381. The reversal of 4222378 is 8732224.

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., 4214809 + 7569 = 2053^2 + 87^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 4³ + 2⁶ + 2¹³ + 2²² + 3⁹ + 7 + 8² .

It is not an unprimeable number, because it can be changed into a prime (4222373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055593 + ... + 1055596.

Almost surely, 2^4222378 is an apocalyptic number.

4222378 is a deficient number, since it is larger than the sum of its proper divisors (2111192).

4222378 is a wasteful number, since it uses less digits than its factorization.

4222378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111191.

The product of its digits is 5376, while the sum is 28.

The square root of 4222378 is about 2054.8425730454. The cubic root of 4222378 is about 161.6289072311.

The spelling of 4222378 in words is "four million, two hundred twenty-two thousand, three hundred seventy-eight".