1155805630 has 72 divisors (see below), whose sum is σ = 2488735368. Its totient is φ = 385342272.

The previous prime is 1155805619. The next prime is 1155805633. The reversal of 1155805630 is 365085511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155805633) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 669949 + ... + 671671.

It is an arithmetic number, because the mean of its divisors is an integer number (34565769).

Almost surely, 2^1155805630 is an apocalyptic number.

1155805630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155805630 is an abundant number, since it is smaller than the sum of its proper divisors (1332929738).

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

1155805630 is a wasteful number, since it uses less digits than its factorization.

1155805630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1155805630 is about 33997.1414974848. The cubic root of 1155805630 is about 1049.4496375012.

The spelling of 1155805630 in words is "one billion, one hundred fifty-five million, eight hundred five thousand, six hundred thirty".