1195138680 has 128 divisors (see below), whose sum is σ = 3644524800. Its totient is φ = 313500672.

The previous prime is 1195138667. The next prime is 1195138687. The reversal of 1195138680 is 868315911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1195138687) 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 31 ways as a sum of consecutive naturals, for example, 2284899 + ... + 2285421.

It is an arithmetic number, because the mean of its divisors is an integer number (28472850).

Almost surely, 2^1195138680 is an apocalyptic number.

1195138680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1195138680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822262400).

1195138680 is an abundant number, since it is smaller than the sum of its proper divisors (2449386120).

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

1195138680 is a wasteful number, since it uses less digits than its factorization.

1195138680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1195138680 is about 34570.7778333089. Note that the first 3 decimals coincide. The cubic root of 1195138680 is about 1061.2216483524.

The spelling of 1195138680 in words is "one billion, one hundred ninety-five million, one hundred thirty-eight thousand, six hundred eighty".