1438260855 has 16 divisors (see below), whose sum is σ = 2363413344. Its totient is φ = 746340480.

The previous prime is 1438260851. The next prime is 1438260871. The reversal of 1438260855 is 5580628341.

It is not a de Polignac number, because 1438260855 - 2² = 1438260851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438260851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1295176 + ... + 1296285.

It is an arithmetic number, because the mean of its divisors is an integer number (147713334).

Almost surely, 2^1438260855 is an apocalyptic number.

1438260855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1438260855 is a deficient number, since it is larger than the sum of its proper divisors (925152489).

1438260855 is a wasteful number, since it uses less digits than its factorization.

1438260855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591506.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 1438260855 is about 37924.4097515044. The cubic root of 1438260855 is about 1128.7884409327.

The spelling of 1438260855 in words is "one billion, four hundred thirty-eight million, two hundred sixty thousand, eight hundred fifty-five".