1187384320 has 88 divisors (see below), whose sum is σ = 2940605568. Its totient is φ = 459571200.

The previous prime is 1187384311. The next prime is 1187384339. The reversal of 1187384320 is 234837811.

It is a self number, because there is not a number n which added to its sum of digits gives 1187384320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154980 + ... + 162460.

Almost surely, 2^1187384320 is an apocalyptic number.

1187384320 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 1187384320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470302784).

1187384320 is an abundant number, since it is smaller than the sum of its proper divisors (1753221248).

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

1187384320 is an equidigital number, since it uses as much as digits as its factorization.

1187384320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537 (or 7519 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1187384320 is about 34458.4433774946. The cubic root of 1187384320 is about 1058.9215089771.

The spelling of 1187384320 in words is "one billion, one hundred eighty-seven million, three hundred eighty-four thousand, three hundred twenty".