1181820078 has 32 divisors (see below), whose sum is σ = 2627608320. Its totient is φ = 393738840.

The previous prime is 1181820077. The next prime is 1181820103. The reversal of 1181820078 is 8700281811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181820077) 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, 132351 + ... + 140997.

It is an arithmetic number, because the mean of its divisors is an integer number (82112760).

Almost surely, 2^1181820078 is an apocalyptic number.

1181820078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1181820078 is an abundant number, since it is smaller than the sum of its proper divisors (1445788242).

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

1181820078 is a wasteful number, since it uses less digits than its factorization.

1181820078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11189 (or 11183 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 1181820078 is about 34377.6101263599. The cubic root of 1181820078 is about 1057.2648357927.

The spelling of 1181820078 in words is "one billion, one hundred eighty-one million, eight hundred twenty thousand, seventy-eight".