1121637388 has 24 divisors (see below), whose sum is σ = 2017395072. Its totient is φ = 545261184.

The previous prime is 1121637371. The next prime is 1121637401. The reversal of 1121637388 is 8837361211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121637388.

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 7 ways as a sum of consecutive naturals, for example, 352581 + ... + 355747.

It is an arithmetic number, because the mean of its divisors is an integer number (84058128).

Almost surely, 2^1121637388 is an apocalyptic number.

It is an amenable number.

1121637388 is a deficient number, since it is larger than the sum of its proper divisors (895757684).

1121637388 is a wasteful number, since it uses less digits than its factorization.

1121637388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5601 (or 5599 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 1121637388 is about 33490.8552891681. The cubic root of 1121637388 is about 1039.0046529688.

Adding to 1121637388 its reverse (8837361211), we get a palindrome (9958998599).

The spelling of 1121637388 in words is "one billion, one hundred twenty-one million, six hundred thirty-seven thousand, three hundred eighty-eight".