1187044380 has 216 divisors, whose sum is σ = 4029632880. Its totient is φ = 282009600.

The previous prime is 1187044357. The next prime is 1187044429. The reversal of 1187044380 is 834407811.

1187044380 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 987780 + ... + 988980.

Almost surely, 2^1187044380 is an apocalyptic number.

1187044380 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 1187044380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014816440).

1187044380 is an abundant number, since it is smaller than the sum of its proper divisors (2842588500).

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

1187044380 is a wasteful number, since it uses less digits than its factorization.

1187044380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1187044380 is about 34453.5104162116. The cubic root of 1187044380 is about 1058.8204453396.

The spelling of 1187044380 in words is "one billion, one hundred eighty-seven million, forty-four thousand, three hundred eighty".