1438864851 has 8 divisors (see below), whose sum is σ = 2019459520. Its totient is φ = 908756712.

The previous prime is 1438864849. The next prime is 1438864859. The reversal of 1438864851 is 1584688341.

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

It is not a de Polignac number, because 1438864851 - 2¹ = 1438864849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438864851.

It is not an unprimeable number, because it can be changed into a prime (1438864859) 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, 12621565 + ... + 12621678.

It is an arithmetic number, because the mean of its divisors is an integer number (252432440).

Almost surely, 2^1438864851 is an apocalyptic number.

1438864851 is a deficient number, since it is larger than the sum of its proper divisors (580594669).

1438864851 is a wasteful number, since it uses less digits than its factorization.

1438864851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25243265.

The product of its digits is 737280, while the sum is 48.

The square root of 1438864851 is about 37932.3720718860. The cubic root of 1438864851 is about 1128.9464299570.

The spelling of 1438864851 in words is "one billion, four hundred thirty-eight million, eight hundred sixty-four thousand, eight hundred fifty-one".