1138244688 has 60 divisors (see below), whose sum is σ = 3640579488. Its totient is φ = 325212480.

The previous prime is 1138244669. The next prime is 1138244699. The reversal of 1138244688 is 8864428311.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563598 + ... + 565613.

Almost surely, 2^1138244688 is an apocalyptic number.

1138244688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1138244688 is an abundant number, since it is smaller than the sum of its proper divisors (2502334800).

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

1138244688 is a wasteful number, since it uses less digits than its factorization.

1138244688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129232 (or 1129223 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 1138244688 is about 33737.8820912042. The cubic root of 1138244688 is about 1044.1074888226.

The spelling of 1138244688 in words is "one billion, one hundred thirty-eight million, two hundred forty-four thousand, six hundred eighty-eight".