1187393740 has 48 divisors (see below), whose sum is σ = 2695194432. Its totient is φ = 436813056.

The previous prime is 1187393737. The next prime is 1187393749. The reversal of 1187393740 is 473937811.

It is a super-3 number, since 3×1187393740³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1187393749) 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 15 ways as a sum of consecutive naturals, for example, 63777 + ... + 80263.

It is an arithmetic number, because the mean of its divisors is an integer number (56149884).

Almost surely, 2^1187393740 is an apocalyptic number.

1187393740 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 1187393740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347597216).

1187393740 is an abundant number, since it is smaller than the sum of its proper divisors (1507800692).

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

1187393740 is a wasteful number, since it uses less digits than its factorization.

1187393740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16786 (or 16784 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 1187393740 is about 34458.5800636068. The cubic root of 1187393740 is about 1058.9243092539.

The spelling of 1187393740 in words is "one billion, one hundred eighty-seven million, three hundred ninety-three thousand, seven hundred forty".