1181488720 has 80 divisors (see below), whose sum is σ = 2841246720. Its totient is φ = 456648192.

The previous prime is 1181488697. The next prime is 1181488733. The reversal of 1181488720 is 278841811.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282001 + ... + 286159.

It is an arithmetic number, because the mean of its divisors is an integer number (35515584).

Almost surely, 2^1181488720 is an apocalyptic number.

1181488720 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 1181488720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420623360).

1181488720 is an abundant number, since it is smaller than the sum of its proper divisors (1659758000).

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

1181488720 is a wasteful number, since it uses less digits than its factorization.

1181488720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292 (or 4286 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 40.

The square root of 1181488720 is about 34372.7904017116. The cubic root of 1181488720 is about 1057.1660147976.

The spelling of 1181488720 in words is "one billion, one hundred eighty-one million, four hundred eighty-eight thousand, seven hundred twenty".