1189013620 has 12 divisors (see below), whose sum is σ = 2496928644. Its totient is φ = 475605440.

The previous prime is 1189013599. The next prime is 1189013621. The reversal of 1189013620 is 263109811.

It can be written as a sum of positive squares in 2 ways, for example, as 370023696 + 818989924 = 19236^2 + 28618^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189013621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 29725321 + ... + 29725360.

It is an arithmetic number, because the mean of its divisors is an integer number (208077387).

Almost surely, 2^1189013620 is an apocalyptic number.

1189013620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189013620 is an abundant number, since it is smaller than the sum of its proper divisors (1307915024).

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

1189013620 is a wasteful number, since it uses less digits than its factorization.

1189013620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59450690 (or 59450688 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1189013620 is about 34482.0767936039. The cubic root of 1189013620 is about 1059.4056297592.

The spelling of 1189013620 in words is "one billion, one hundred eighty-nine million, thirteen thousand, six hundred twenty".