1115660538 has 24 divisors (see below), whose sum is σ = 2439859968. Its totient is φ = 368410632.

The previous prime is 1115660521. The next prime is 1115660587. The reversal of 1115660538 is 8350665111.

1115660538 is a `hidden beast` number, since 1 + 1 + 15 + 6 + 605 + 38 = 666.

It is an unprimeable number.

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, 287706 + ... + 291557.

It is an arithmetic number, because the mean of its divisors is an integer number (101660832).

Almost surely, 2^1115660538 is an apocalyptic number.

1115660538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1115660538 is an abundant number, since it is smaller than the sum of its proper divisors (1324199430).

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

1115660538 is a wasteful number, since it uses less digits than its factorization.

1115660538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579378 (or 579375 counting only the distinct ones).

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

The square root of 1115660538 is about 33401.5050259715. The cubic root of 1115660538 is about 1037.1558564010.

The spelling of 1115660538 in words is "one billion, one hundred fifteen million, six hundred sixty thousand, five hundred thirty-eight".