1187047680 has 576 divisors, whose sum is σ = 4834959360. Its totient is φ = 241532928.

The previous prime is 1187047679. The next prime is 1187047717. The reversal of 1187047680 is 867407811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15025881 + ... + 15025959.

Almost surely, 2^1187047680 is an apocalyptic number.

1187047680 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 1187047680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2417479680).

1187047680 is an abundant number, since it is smaller than the sum of its proper divisors (3647911680).

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

1187047680 is a wasteful number, since it uses less digits than its factorization.

1187047680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 1187047680 is about 34453.5583067990. The cubic root of 1187047680 is about 1058.8214265172.

The spelling of 1187047680 in words is "one billion, one hundred eighty-seven million, forty-seven thousand, six hundred eighty".