1115612440 has 16 divisors (see below), whose sum is σ = 2510128080. Its totient is φ = 446244960.

The previous prime is 1115612413. The next prime is 1115612453. The reversal of 1115612440 is 442165111.

It is a super-2 number, since 2×1115612440² = 2489182232565507200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13945116 + ... + 13945195.

It is an arithmetic number, because the mean of its divisors is an integer number (156883005).

Almost surely, 2^1115612440 is an apocalyptic number.

1115612440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115612440 is an abundant number, since it is smaller than the sum of its proper divisors (1394515640).

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

1115612440 is a wasteful number, since it uses less digits than its factorization.

1115612440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27890322 (or 27890318 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1115612440 is about 33400.7850207147. The cubic root of 1115612440 is about 1037.1409516764.

Adding to 1115612440 its reverse (442165111), we get a palindrome (1557777551).

The spelling of 1115612440 in words is "one billion, one hundred fifteen million, six hundred twelve thousand, four hundred forty".