1438880555 has 16 divisors (see below), whose sum is σ = 1974399744. Its totient is φ = 986122080.

The previous prime is 1438880539. The next prime is 1438880557. The reversal of 1438880555 is 5550888341.

It is a happy number.

It is not a de Polignac number, because 1438880555 - 2⁴ = 1438880539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438880557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60164 + ... + 80606.

It is an arithmetic number, because the mean of its divisors is an integer number (123399984).

Almost surely, 2^1438880555 is an apocalyptic number.

1438880555 is a deficient number, since it is larger than the sum of its proper divisors (535519189).

1438880555 is a wasteful number, since it uses less digits than its factorization.

1438880555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22466.

The product of its (nonzero) digits is 768000, while the sum is 47.

The square root of 1438880555 is about 37932.5790712944. The cubic root of 1438880555 is about 1128.9505371090.

The spelling of 1438880555 in words is "one billion, four hundred thirty-eight million, eight hundred eighty thousand, five hundred fifty-five".