1438826505 has 16 divisors (see below), whose sum is σ = 2305165824. Its totient is φ = 766359680.

The previous prime is 1438826461. The next prime is 1438826527. The reversal of 1438826505 is 5056288341.

It is not a de Polignac number, because 1438826505 - 2¹² = 1438822409 is a prime.

It is a super-2 number, since 2×1438826505² = 4140443422981030050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51609 + ... + 74438.

It is an arithmetic number, because the mean of its divisors is an integer number (144072864).

Almost surely, 2^1438826505 is an apocalyptic number.

1438826505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1438826505 is a deficient number, since it is larger than the sum of its proper divisors (866339319).

1438826505 is a wasteful number, since it uses less digits than its factorization.

1438826505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126816.

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

The square root of 1438826505 is about 37931.8666163425. The cubic root of 1438826505 is about 1128.9364009946.

The spelling of 1438826505 in words is "one billion, four hundred thirty-eight million, eight hundred twenty-six thousand, five hundred five".