1181828380 has 24 divisors (see below), whose sum is σ = 2485555632. Its totient is φ = 472023552.

The previous prime is 1181828377. The next prime is 1181828497. The reversal of 1181828380 is 838281811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30442 + ... + 57361.

It is an arithmetic number, because the mean of its divisors is an integer number (103564818).

Almost surely, 2^1181828380 is an apocalyptic number.

1181828380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181828380 is an abundant number, since it is smaller than the sum of its proper divisors (1303727252).

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

1181828380 is a wasteful number, since it uses less digits than its factorization.

1181828380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88485 (or 88483 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 40.

The square root of 1181828380 is about 34377.7308733430. The cubic root of 1181828380 is about 1057.2673114635.

The spelling of 1181828380 in words is "one billion, one hundred eighty-one million, eight hundred twenty-eight thousand, three hundred eighty".