1438127686 has 4 divisors (see below), whose sum is σ = 2157191532. Its totient is φ = 719063842.

The previous prime is 1438127671. The next prime is 1438127687. The reversal of 1438127686 is 6867218341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1438127686² = 4136422482479429192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438127687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359531920 + ... + 359531923.

It is an arithmetic number, because the mean of its divisors is an integer number (539297883).

Almost surely, 2^1438127686 is an apocalyptic number.

1438127686 is a deficient number, since it is larger than the sum of its proper divisors (719063846).

1438127686 is an equidigital number, since it uses as much as digits as its factorization.

1438127686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719063845.

The product of its digits is 387072, while the sum is 46.

The square root of 1438127686 is about 37922.6539946771. The cubic root of 1438127686 is about 1128.7536015717.

The spelling of 1438127686 in words is "one billion, four hundred thirty-eight million, one hundred twenty-seven thousand, six hundred eighty-six".