1115560638 has 24 divisors (see below), whose sum is σ = 2559228048. Its totient is φ = 349979712.

The previous prime is 1115560601. The next prime is 1115560639. The reversal of 1115560638 is 8360655111.

1115560638 is a `hidden beast` number, since 1 + 1 + 15 + 5 + 6 + 0 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115560639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1822506 + ... + 1823117.

It is an arithmetic number, because the mean of its divisors is an integer number (106634502).

Almost surely, 2^1115560638 is an apocalyptic number.

1115560638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1115560638 is an abundant number, since it is smaller than the sum of its proper divisors (1443667410).

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

1115560638 is a wasteful number, since it uses less digits than its factorization.

1115560638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645648 (or 3645645 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1115560638 is about 33400.0095508968. The cubic root of 1115560638 is about 1037.1248986681.

The spelling of 1115560638 in words is "one billion, one hundred fifteen million, five hundred sixty thousand, six hundred thirty-eight".