1121178240 has 1024 divisors, whose sum is σ = 5264179200. Its totient is φ = 218972160.

The previous prime is 1121178229. The next prime is 1121178241. The reversal of 1121178240 is 428711211.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121178241) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 36167025 + ... + 36167055.

It is an arithmetic number, because the mean of its divisors is an integer number (5140800).

Almost surely, 2^1121178240 is an apocalyptic number.

1121178240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121178240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632089600).

1121178240 is an abundant number, since it is smaller than the sum of its proper divisors (4143000960).

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

1121178240 is a wasteful number, since it uses less digits than its factorization.

1121178240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1121178240 is about 33483.9997610799. Note that the first 3 decimals coincide. The cubic root of 1121178240 is about 1038.8628596633.

Adding to 1121178240 its reverse (428711211), we get a palindrome (1549889451).

The spelling of 1121178240 in words is "one billion, one hundred twenty-one million, one hundred seventy-eight thousand, two hundred forty".