1183801980 has 48 divisors (see below), whose sum is σ = 3335784480. Its totient is φ = 313667328.

The previous prime is 1183801963. The next prime is 1183801981. The reversal of 1183801980 is 891083811.

1183801980 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1183801981) 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, 53415 + ... + 72254.

It is an arithmetic number, because the mean of its divisors is an integer number (69495510).

Almost surely, 2^1183801980 is an apocalyptic number.

1183801980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1183801980 is an abundant number, since it is smaller than the sum of its proper divisors (2151982500).

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

1183801980 is a wasteful number, since it uses less digits than its factorization.

1183801980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125838 (or 125836 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 39.

The square root of 1183801980 is about 34406.4235281728. The cubic root of 1183801980 is about 1057.8555137089.

The spelling of 1183801980 in words is "one billion, one hundred eighty-three million, eight hundred one thousand, nine hundred eighty".