1438518669 has 8 divisors (see below), whose sum is σ = 2192028480. Its totient is φ = 822010656.

The previous prime is 1438518611. The next prime is 1438518673. The reversal of 1438518669 is 9668158341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1438518669 - 2⁷ = 1438518541 is a prime.

It is a super-2 number, since 2×1438518669² = 4138671922123063122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438518469) 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 7 ways as a sum of consecutive naturals, for example, 34250424 + ... + 34250465.

It is an arithmetic number, because the mean of its divisors is an integer number (274003560).

Almost surely, 2^1438518669 is an apocalyptic number.

It is an amenable number.

1438518669 is a deficient number, since it is larger than the sum of its proper divisors (753509811).

1438518669 is an equidigital number, since it uses as much as digits as its factorization.

1438518669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68500899.

The product of its digits is 1244160, while the sum is 51.

The square root of 1438518669 is about 37927.8086501185. The cubic root of 1438518669 is about 1128.8558835145.

The spelling of 1438518669 in words is "one billion, four hundred thirty-eight million, five hundred eighteen thousand, six hundred sixty-nine".