1438889487 has 8 divisors (see below), whose sum is σ = 2192593536. Its totient is φ = 822222552.

The previous prime is 1438889471. The next prime is 1438889539. The reversal of 1438889487 is 7849888341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1438889487 - 2⁴ = 1438889471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1438889487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438889447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34259253 + ... + 34259294.

It is an arithmetic number, because the mean of its divisors is an integer number (274074192).

Almost surely, 2^1438889487 is an apocalyptic number.

1438889487 is a deficient number, since it is larger than the sum of its proper divisors (753704049).

1438889487 is an equidigital number, since it uses as much as digits as its factorization.

1438889487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68518557.

The product of its digits is 12386304, while the sum is 60.

The square root of 1438889487 is about 37932.6968063174. The cubic root of 1438889487 is about 1128.9528731300.

The spelling of 1438889487 in words is "one billion, four hundred thirty-eight million, eight hundred eighty-nine thousand, four hundred eighty-seven".