1178998220 has 12 divisors (see below), whose sum is σ = 2475896304. Its totient is φ = 471599280.

The previous prime is 1178998213. The next prime is 1178998283. The reversal of 1178998220 is 228998711.

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 3 ways as a sum of consecutive naturals, for example, 29474936 + ... + 29474975.

It is an arithmetic number, because the mean of its divisors is an integer number (206324692).

Almost surely, 2^1178998220 is an apocalyptic number.

1178998220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1178998220 is an abundant number, since it is smaller than the sum of its proper divisors (1296898084).

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

1178998220 is a wasteful number, since it uses less digits than its factorization.

1178998220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58949920 (or 58949918 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1178998220 is about 34336.5435068820. The cubic root of 1178998220 is about 1056.4226802632.

The spelling of 1178998220 in words is "one billion, one hundred seventy-eight million, nine hundred ninety-eight thousand, two hundred twenty".