1438644935 has 16 divisors (see below), whose sum is σ = 2124768576. Its totient is φ = 910614528.

The previous prime is 1438644929. The next prime is 1438644959. The reversal of 1438644935 is 5394468341.

It is a cyclic number.

It is not a de Polignac number, because 1438644935 - 2¹⁰ = 1438643911 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438644935.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1580474 + ... + 1581383.

It is an arithmetic number, because the mean of its divisors is an integer number (132798036).

Almost surely, 2^1438644935 is an apocalyptic number.

1438644935 is a deficient number, since it is larger than the sum of its proper divisors (686123641).

1438644935 is a wasteful number, since it uses less digits than its factorization.

1438644935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161882.

The product of its digits is 1244160, while the sum is 47.

The square root of 1438644935 is about 37929.4731706097. The cubic root of 1438644935 is about 1128.8889109962. Note that the first 3 decimals are identical.

The spelling of 1438644935 in words is "one billion, four hundred thirty-eight million, six hundred forty-four thousand, nine hundred thirty-five".