4278438 has 12 divisors (see below), whose sum is σ = 9269988. Its totient is φ = 1426140.

The previous prime is 4278433. The next prime is 4278451. The reversal of 4278438 is 8348724.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118828 + ... + 118863.

It is an arithmetic number, because the mean of its divisors is an integer number (772499).

Almost surely, 2^4278438 is an apocalyptic number.

4278438 is an abundant number, since it is smaller than the sum of its proper divisors (4991550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4278438 is a wasteful number, since it uses less digits than its factorization.

4278438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237699 (or 237696 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 4278438 is about 2068.4385415090. The cubic root of 4278438 is about 162.3410738110.

The spelling of 4278438 in words is "four million, two hundred seventy-eight thousand, four hundred thirty-eight".