1438146681 has 16 divisors (see below), whose sum is σ = 1942214400. Its totient is φ = 946500048.

The previous prime is 1438146631. The next prime is 1438146683. The reversal of 1438146681 is 1866418341.

It is not a de Polignac number, because 1438146681 - 2⁶ = 1438146617 is a prime.

It is a super-2 number, since 2×1438146681² = 4136531752142631522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438146683) 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, 65010 + ... + 84276.

It is an arithmetic number, because the mean of its divisors is an integer number (121388400).

Almost surely, 2^1438146681 is an apocalyptic number.

It is an amenable number.

1438146681 is a deficient number, since it is larger than the sum of its proper divisors (504067719).

1438146681 is a wasteful number, since it uses less digits than its factorization.

1438146681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19588.

The product of its digits is 110592, while the sum is 42.

The square root of 1438146681 is about 37922.9044378196. The cubic root of 1438146681 is about 1128.7585711305.

The spelling of 1438146681 in words is "one billion, four hundred thirty-eight million, one hundred forty-six thousand, six hundred eighty-one".