1189873640 has 32 divisors (see below), whose sum is σ = 2739480480. Its totient is φ = 464880192.

The previous prime is 1189873631. The next prime is 1189873693. The reversal of 1189873640 is 463789811.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344174 + ... + 347613.

It is an arithmetic number, because the mean of its divisors is an integer number (85608765).

Almost surely, 2^1189873640 is an apocalyptic number.

1189873640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189873640 is an abundant number, since it is smaller than the sum of its proper divisors (1549606840).

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

1189873640 is a wasteful number, since it uses less digits than its factorization.

1189873640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691841 (or 691837 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1189873640 is about 34494.5450759972. The cubic root of 1189873640 is about 1059.6609928132.

The spelling of 1189873640 in words is "one billion, one hundred eighty-nine million, eight hundred seventy-three thousand, six hundred forty".