1438081323 has 32 divisors (see below), whose sum is σ = 2348269056. Its totient is φ = 764087808.

The previous prime is 1438081303. The next prime is 1438081349. The reversal of 1438081323 is 3231808341.

It is not a de Polignac number, because 1438081323 - 2⁸ = 1438081067 is a prime.

It is a super-2 number, since 2×1438081323² = 4136155783122860658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438081303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5365 + ... + 53897.

It is an arithmetic number, because the mean of its divisors is an integer number (73383408).

Almost surely, 2^1438081323 is an apocalyptic number.

1438081323 is a deficient number, since it is larger than the sum of its proper divisors (910187733).

1438081323 is a wasteful number, since it uses less digits than its factorization.

1438081323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48643.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1438081323 is about 37922.0427060569. The cubic root of 1438081323 is about 1128.7414716878.

Adding to 1438081323 its reverse (3231808341), we get a palindrome (4669889664).

It can be divided in two parts, 14380 and 81323, that added together give a triangular number (95703 = T₄₃₇).

The spelling of 1438081323 in words is "one billion, four hundred thirty-eight million, eighty-one thousand, three hundred twenty-three".