1438642683 has 12 divisors (see below), whose sum is σ = 2107308528. Its totient is φ = 945586320.

The previous prime is 1438642679. The next prime is 1438642721. The reversal of 1438642683 is 3862468341.

1438642683 is a `hidden beast` number, since 1 + 4 + 386 + 4 + 268 + 3 = 666.

It is not a de Polignac number, because 1438642683 - 2² = 1438642679 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1438642603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1125060 + ... + 1126337.

It is an arithmetic number, because the mean of its divisors is an integer number (175609044).

Almost surely, 2^1438642683 is an apocalyptic number.

1438642683 is a deficient number, since it is larger than the sum of its proper divisors (668665845).

1438642683 is a wasteful number, since it uses less digits than its factorization.

1438642683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251474 (or 2251471 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 1438642683 is about 37929.4434839216. The cubic root of 1438642683 is about 1128.8883219560. Note that the first 3 decimals are identical.

The spelling of 1438642683 in words is "one billion, four hundred thirty-eight million, six hundred forty-two thousand, six hundred eighty-three".