1438913678 has 16 divisors (see below), whose sum is σ = 2171954400. Its totient is φ = 714938400.

The previous prime is 1438913669. The next prime is 1438913699. The reversal of 1438913678 is 8763198341.

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 7 ways as a sum of consecutive naturals, for example, 404588 + ... + 408128.

It is an arithmetic number, because the mean of its divisors is an integer number (135747150).

Almost surely, 2^1438913678 is an apocalyptic number.

1438913678 is a deficient number, since it is larger than the sum of its proper divisors (733040722).

1438913678 is a wasteful number, since it uses less digits than its factorization.

1438913678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763.

The product of its digits is 870912, while the sum is 50.

The square root of 1438913678 is about 37933.0156723665. The cubic root of 1438913678 is about 1128.9591998484.

The spelling of 1438913678 in words is "one billion, four hundred thirty-eight million, nine hundred thirteen thousand, six hundred seventy-eight".