4421438278 has 16 divisors (see below), whose sum is σ = 6951920976. Its totient is φ = 2106639360.

The previous prime is 4421438261. The next prime is 4421438279. The reversal of 4421438278 is 8728341244.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421438279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623451 + ... + 630502.

It is an arithmetic number, because the mean of its divisors is an integer number (434495061).

Almost surely, 2^4421438278 is an apocalyptic number.

4421438278 is a deficient number, since it is larger than the sum of its proper divisors (2530482698).

4421438278 is a wasteful number, since it uses less digits than its factorization.

4421438278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254039.

The product of its digits is 344064, while the sum is 43.

The square root of 4421438278 is about 66493.8965469764. The cubic root of 4421438278 is about 1641.2995695160.

The spelling of 4421438278 in words is "four billion, four hundred twenty-one million, four hundred thirty-eight thousand, two hundred seventy-eight".