1438699565 has 16 divisors (see below), whose sum is σ = 1802687616. Its totient is φ = 1100193600.

The previous prime is 1438699531. The next prime is 1438699583. The reversal of 1438699565 is 5659968341.

It is not a de Polignac number, because 1438699565 - 2¹⁸ = 1438437421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438699565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228155 + ... + 234375.

It is an arithmetic number, because the mean of its divisors is an integer number (112667976).

Almost surely, 2^1438699565 is an apocalyptic number.

It is an amenable number.

1438699565 is a deficient number, since it is larger than the sum of its proper divisors (363988051).

1438699565 is a wasteful number, since it uses less digits than its factorization.

1438699565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260.

The product of its digits is 6998400, while the sum is 56.

The square root of 1438699565 is about 37930.1933161433. The cubic root of 1438699565 is about 1128.9032000027.

The spelling of 1438699565 in words is "one billion, four hundred thirty-eight million, six hundred ninety-nine thousand, five hundred sixty-five".