1438143186 has 32 divisors (see below), whose sum is σ = 3056080320. Its totient is φ = 451172928.

The previous prime is 1438143151. The next prime is 1438143191. The reversal of 1438143186 is 6813418341.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5085 + ... + 53871.

It is an arithmetic number, because the mean of its divisors is an integer number (95502510).

Almost surely, 2^1438143186 is an apocalyptic number.

1438143186 is an abundant number, since it is smaller than the sum of its proper divisors (1617937134).

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

1438143186 is an equidigital number, since it uses as much as digits as its factorization.

1438143186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48843 (or 48809 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 1438143186 is about 37922.8583574603. The cubic root of 1438143186 is about 1128.7576567559.

The spelling of 1438143186 in words is "one billion, four hundred thirty-eight million, one hundred forty-three thousand, one hundred eighty-six".