1180945920 has 320 divisors, whose sum is σ = 4709270016. Its totient is φ = 245268480.

The previous prime is 1180945907. The next prime is 1180945951. The reversal of 1180945920 is 295490811.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 590362 + ... + 592358.

Almost surely, 2^1180945920 is an apocalyptic number.

1180945920 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 1180945920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354635008).

1180945920 is an abundant number, since it is smaller than the sum of its proper divisors (3528324096).

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

1180945920 is a wasteful number, since it uses less digits than its factorization.

1180945920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1180945920 is about 34364.8937143708. The cubic root of 1180945920 is about 1057.0040954603.

The spelling of 1180945920 in words is "one billion, one hundred eighty million, nine hundred forty-five thousand, nine hundred twenty".