1161820730 has 32 divisors (see below), whose sum is σ = 2440889856. Its totient is φ = 389862144.

The previous prime is 1161820729. The next prime is 1161820733. The reversal of 1161820730 is 370281611.

It is a junction number, because it is equal to n+sod(n) for n = 1161820693 and 1161820702.

It is not an unprimeable number, because it can be changed into a prime (1161820733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173279 + ... + 179858.

It is an arithmetic number, because the mean of its divisors is an integer number (76277808).

Almost surely, 2^1161820730 is an apocalyptic number.

1161820730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161820730 is an abundant number, since it is smaller than the sum of its proper divisors (1279069126).

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

1161820730 is a wasteful number, since it uses less digits than its factorization.

1161820730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353198.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1161820730 is about 34085.4914883151. The cubic root of 1161820730 is about 1051.2670207528.

The spelling of 1161820730 in words is "one billion, one hundred sixty-one million, eight hundred twenty thousand, seven hundred thirty".