1185115830 has 16 divisors (see below), whose sum is σ = 2844278064. Its totient is φ = 316030880.

The previous prime is 1185115829. The next prime is 1185115853. The reversal of 1185115830 is 385115811.

It is a junction number, because it is equal to n+sod(n) for n = 1185115791 and 1185115800.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19751901 + ... + 19751960.

It is an arithmetic number, because the mean of its divisors is an integer number (177767379).

Almost surely, 2^1185115830 is an apocalyptic number.

1185115830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1185115830 is an abundant number, since it is smaller than the sum of its proper divisors (1659162234).

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

1185115830 is a wasteful number, since it uses less digits than its factorization.

1185115830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39503871.

The product of its (nonzero) digits is 4800, while the sum is 33.

The square root of 1185115830 is about 34425.5113251786. The cubic root of 1185115830 is about 1058.2467248585.

The spelling of 1185115830 in words is "one billion, one hundred eighty-five million, one hundred fifteen thousand, eight hundred thirty".