1180266640 has 160 divisors (see below), whose sum is σ = 3229793280. Its totient is φ = 392781312.

The previous prime is 1180266629. The next prime is 1180266649. The reversal of 1180266640 is 466620811.

It is a junction number, because it is equal to n+sod(n) for n = 1180266596 and 1180266605.

It is not an unprimeable number, because it can be changed into a prime (1180266649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3113971 + ... + 3114349.

It is an arithmetic number, because the mean of its divisors is an integer number (20186208).

Almost surely, 2^1180266640 is an apocalyptic number.

1180266640 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 1180266640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614896640).

1180266640 is an abundant number, since it is smaller than the sum of its proper divisors (2049526640).

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

1180266640 is a wasteful number, since it uses less digits than its factorization.

1180266640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1180266640 is about 34355.0089506610. The cubic root of 1180266640 is about 1056.8013936999.

The spelling of 1180266640 in words is "one billion, one hundred eighty million, two hundred sixty-six thousand, six hundred forty".