1438506965 has 12 divisors (see below), whose sum is σ = 2008038636. Its totient is φ = 986404608.

The previous prime is 1438506959. The next prime is 1438506977. The reversal of 1438506965 is 5696058341.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 762974884 + 675532081 = 27622^2 + 25991^2 .

It is not a de Polignac number, because 1438506965 - 2⁸ = 1438506709 is a prime.

It is a super-2 number, since 2×1438506965² = 4138604576707022450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2935484 + ... + 2935973.

It is an arithmetic number, because the mean of its divisors is an integer number (167336553).

Almost surely, 2^1438506965 is an apocalyptic number.

It is an amenable number.

1438506965 is a deficient number, since it is larger than the sum of its proper divisors (569531671).

1438506965 is an equidigital number, since it uses as much as digits as its factorization.

1438506965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5871476 (or 5871469 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 1438506965 is about 37927.6543566828. The cubic root of 1438506965 is about 1128.8528219936.

The spelling of 1438506965 in words is "one billion, four hundred thirty-eight million, five hundred six thousand, nine hundred sixty-five".