1158081620 has 12 divisors (see below), whose sum is σ = 2431971444. Its totient is φ = 463232640.

The previous prime is 1158081607. The next prime is 1158081623. The reversal of 1158081620 is 261808511.

It can be written as a sum of positive squares in 2 ways, for example, as 689272516 + 468809104 = 26254^2 + 21652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158081623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28952021 + ... + 28952060.

It is an arithmetic number, because the mean of its divisors is an integer number (202664287).

Almost surely, 2^1158081620 is an apocalyptic number.

1158081620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158081620 is an abundant number, since it is smaller than the sum of its proper divisors (1273889824).

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

1158081620 is a wasteful number, since it uses less digits than its factorization.

1158081620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57904090 (or 57904088 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 1158081620 is about 34030.5982903622. The cubic root of 1158081620 is about 1050.1380377856.

The spelling of 1158081620 in words is "one billion, one hundred fifty-eight million, eighty-one thousand, six hundred twenty".