444400138 has 16 divisors (see below), whose sum is σ = 820431360. Its totient is φ = 175806576.

The previous prime is 444400133. The next prime is 444400153. The reversal of 444400138 is 831004444.

It is not an unprimeable number, because it can be changed into a prime (444400133) 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, 1220698 + ... + 1221061.

It is an arithmetic number, because the mean of its divisors is an integer number (51276960).

Almost surely, 2^444400138 is an apocalyptic number.

444400138 is a deficient number, since it is larger than the sum of its proper divisors (376031222).

444400138 is a wasteful number, since it uses less digits than its factorization.

444400138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441781.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 444400138 is about 21080.8002220030. The cubic root of 444400138 is about 763.1174684172.

The spelling of 444400138 in words is "four hundred forty-four million, four hundred thousand, one hundred thirty-eight".