1178638146 has 48 divisors (see below), whose sum is σ = 2945342400. Its totient is φ = 333660384.

The previous prime is 1178638141. The next prime is 1178638159. The reversal of 1178638146 is 6418368711.

1178638146 is a `hidden beast` number, since 1 + 1 + 7 + 8 + 638 + 1 + 4 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (1178638141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29176 + ... + 56643.

It is an arithmetic number, because the mean of its divisors is an integer number (61361300).

Almost surely, 2^1178638146 is an apocalyptic number.

1178638146 is an abundant number, since it is smaller than the sum of its proper divisors (1766704254).

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

1178638146 is a wasteful number, since it uses less digits than its factorization.

1178638146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85943 (or 85940 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1178638146 is about 34331.2998006193. The cubic root of 1178638146 is about 1056.3151231115.

The spelling of 1178638146 in words is "one billion, one hundred seventy-eight million, six hundred thirty-eight thousand, one hundred forty-six".