1185487380 has 288 divisors, whose sum is σ = 4681514880. Its totient is φ = 246274560.

The previous prime is 1185487357. The next prime is 1185487417. The reversal of 1185487380 is 837845811.

It is a happy number.

1185487380 is a `hidden beast` number, since 11 + 85 + 487 + 3 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 289024 + ... + 293096.

It is an arithmetic number, because the mean of its divisors is an integer number (16255260).

Almost surely, 2^1185487380 is an apocalyptic number.

1185487380 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 1185487380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340757440).

1185487380 is an abundant number, since it is smaller than the sum of its proper divisors (3496027500).

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

1185487380 is a wasteful number, since it uses less digits than its factorization.

1185487380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 4101 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 1185487380 is about 34430.9073362873. The cubic root of 1185487380 is about 1058.3573049041.

The spelling of 1185487380 in words is "one billion, one hundred eighty-five million, four hundred eighty-seven thousand, three hundred eighty".