4018438 has 4 divisors (see below), whose sum is σ = 6027660. Its totient is φ = 2009218.

The previous prime is 4018433. The next prime is 4018457. The reversal of 4018438 is 8348104.

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

It is a super-2 number, since 2×4018438² = 32295687919688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004608 + ... + 1004611.

It is an arithmetic number, because the mean of its divisors is an integer number (1506915).

Almost surely, 2^4018438 is an apocalyptic number.

4018438 is a deficient number, since it is larger than the sum of its proper divisors (2009222).

4018438 is a wasteful number, since it uses less digits than its factorization.

4018438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009221.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 4018438 is about 2004.6042003348. The cubic root of 4018438 is about 158.9836355665.

The spelling of 4018438 in words is "four million, eighteen thousand, four hundred thirty-eight".