1115540020 has 48 divisors (see below), whose sum is σ = 2793708288. Its totient is φ = 365840640.

The previous prime is 1115540009. The next prime is 1115540021. The reversal of 1115540020 is 200455111.

It is a self number, because there is not a number n which added to its sum of digits gives 1115540020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115540021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170001 + ... + 176440.

It is an arithmetic number, because the mean of its divisors is an integer number (58202256).

Almost surely, 2^1115540020 is an apocalyptic number.

1115540020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115540020 is an abundant number, since it is smaller than the sum of its proper divisors (1678168268).

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

1115540020 is a wasteful number, since it uses less digits than its factorization.

1115540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346480 (or 346478 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1115540020 is about 33399.7008968643. The cubic root of 1115540020 is about 1037.1185091834.

Adding to 1115540020 its reverse (200455111), we get a palindrome (1315995131).

The spelling of 1115540020 in words is "one billion, one hundred fifteen million, five hundred forty thousand, twenty".