1438535825 has 6 divisors (see below), whose sum is σ = 1783784454. Its totient is φ = 1150828640.

The previous prime is 1438535783. The next prime is 1438535843. The reversal of 1438535825 is 5285358341.

It can be written as a sum of positive squares in 3 ways, for example, as 3717184 + 1434818641 = 1928^2 + 37879^2 .

It is not a de Polignac number, because 1438535825 - 2¹² = 1438531729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28770692 + ... + 28770741.

It is an arithmetic number, because the mean of its divisors is an integer number (297297409).

Almost surely, 2^1438535825 is an apocalyptic number.

It is an amenable number.

1438535825 is a deficient number, since it is larger than the sum of its proper divisors (345248629).

1438535825 is an equidigital number, since it uses as much as digits as its factorization.

1438535825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57541443 (or 57541438 counting only the distinct ones).

The product of its digits is 576000, while the sum is 44.

The square root of 1438535825 is about 37928.0348159511. The cubic root of 1438535825 is about 1128.8603711343.

The spelling of 1438535825 in words is "one billion, four hundred thirty-eight million, five hundred thirty-five thousand, eight hundred twenty-five".