1178907820 has 24 divisors (see below), whose sum is σ = 2606007600. Its totient is φ = 446743872.

The previous prime is 1178907787. The next prime is 1178907871. The reversal of 1178907820 is 287098711.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 1550815 + ... + 1551574.

It is an arithmetic number, because the mean of its divisors is an integer number (108583650).

Almost surely, 2^1178907820 is an apocalyptic number.

1178907820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1178907820 is an abundant number, since it is smaller than the sum of its proper divisors (1427099780).

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

1178907820 is a wasteful number, since it uses less digits than its factorization.

1178907820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102417 (or 3102415 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 1178907820 is about 34335.2270998751. The cubic root of 1178907820 is about 1056.3956790771.

The spelling of 1178907820 in words is "one billion, one hundred seventy-eight million, nine hundred seven thousand, eight hundred twenty".