1438736687 has 12 divisors (see below), whose sum is σ = 1522855920. Its totient is φ = 1356690720.

The previous prime is 1438736683. The next prime is 1438736729. The reversal of 1438736687 is 7866378341.

It is not a de Polignac number, because 1438736687 - 2² = 1438736683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438736683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109739 + ... + 122147.

It is an arithmetic number, because the mean of its divisors is an integer number (126904660).

Almost surely, 2^1438736687 is an apocalyptic number.

1438736687 is a deficient number, since it is larger than the sum of its proper divisors (84119233).

1438736687 is an equidigital number, since it uses as much as digits as its factorization.

1438736687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12574 (or 12503 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 53.

The square root of 1438736687 is about 37930.6826592931. The cubic root of 1438736687 is about 1128.9129094156.

The spelling of 1438736687 in words is "one billion, four hundred thirty-eight million, seven hundred thirty-six thousand, six hundred eighty-seven".