1438841886 has 32 divisors (see below), whose sum is σ = 3066400800. Its totient is φ = 448521216.

The previous prime is 1438841881. The next prime is 1438841969. The reversal of 1438841886 is 6881488341.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438841881) 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 15 ways as a sum of consecutive naturals, for example, 28911 + ... + 60938.

It is an arithmetic number, because the mean of its divisors is an integer number (95825025).

Almost surely, 2^1438841886 is an apocalyptic number.

1438841886 is an abundant number, since it is smaller than the sum of its proper divisors (1627558914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1438841886 is a wasteful number, since it uses less digits than its factorization.

1438841886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90028.

The product of its digits is 1179648, while the sum is 51.

The square root of 1438841886 is about 37932.0693608983. The cubic root of 1438841886 is about 1128.9404237425.

It can be divided in two parts, 143884188 and 6, that multiplied together give a triangular number (863305128 = T₄₁₅₅₂).

The spelling of 1438841886 in words is "one billion, four hundred thirty-eight million, eight hundred forty-one thousand, eight hundred eighty-six".