1184320640 has 128 divisors (see below), whose sum is σ = 3018384000. Its totient is φ = 442810368.

The previous prime is 1184320603. The next prime is 1184320649. The reversal of 1184320640 is 460234811.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1184320649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2164847 + ... + 2165393.

It is an arithmetic number, because the mean of its divisors is an integer number (23581125).

Almost surely, 2^1184320640 is an apocalyptic number.

1184320640 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 1184320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509192000).

1184320640 is an abundant number, since it is smaller than the sum of its proper divisors (1834063360).

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

1184320640 is a wasteful number, since it uses less digits than its factorization.

1184320640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1184320640 is about 34413.9599581333. The cubic root of 1184320640 is about 1058.0099841468.

The spelling of 1184320640 in words is "one billion, one hundred eighty-four million, three hundred twenty thousand, six hundred forty".