1178646378 has 32 divisors (see below), whose sum is σ = 2901284736. Its totient is φ = 310851648.

The previous prime is 1178646377. The next prime is 1178646451. The reversal of 1178646378 is 8736468711.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1178646378.

It is not an unprimeable number, because it can be changed into a prime (1178646377) 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, 1078801 + ... + 1079892.

It is an arithmetic number, because the mean of its divisors is an integer number (90665148).

Almost surely, 2^1178646378 is an apocalyptic number.

1178646378 is an abundant number, since it is smaller than the sum of its proper divisors (1722638358).

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

1178646378 is a wasteful number, since it uses less digits than its factorization.

1178646378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158718.

The product of its digits is 1354752, while the sum is 51.

The square root of 1178646378 is about 34331.4196910061. The cubic root of 1178646378 is about 1056.3175823242.

The spelling of 1178646378 in words is "one billion, one hundred seventy-eight million, six hundred forty-six thousand, three hundred seventy-eight".