1111631438 has 16 divisors (see below), whose sum is σ = 1695145344. Its totient is φ = 546610680.

The previous prime is 1111631429. The next prime is 1111631447. The reversal of 1111631438 is 8341361111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1111631429) and next prime (1111631447).

It is a self number, because there is not a number n which added to its sum of digits gives 1111631438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77981 + ... + 91127.

It is an arithmetic number, because the mean of its divisors is an integer number (105946584).

Almost surely, 2^1111631438 is an apocalyptic number.

1111631438 is a deficient number, since it is larger than the sum of its proper divisors (583513906).

1111631438 is a wasteful number, since it uses less digits than its factorization.

1111631438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13847.

The product of its digits is 1728, while the sum is 29.

The square root of 1111631438 is about 33341.1373231328. The cubic root of 1111631438 is about 1035.9058210826.

Adding to 1111631438 its reverse (8341361111), we get a palindrome (9452992549).

The spelling of 1111631438 in words is "one billion, one hundred eleven million, six hundred thirty-one thousand, four hundred thirty-eight".