1178571978 has 32 divisors (see below), whose sum is σ = 2682933120. Its totient is φ = 383274720.

The previous prime is 1178571973. The next prime is 1178571991. The reversal of 1178571978 is 8791758711.

1178571978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1178571973) 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, 263950 + ... + 268377.

It is an arithmetic number, because the mean of its divisors is an integer number (83841660).

Almost surely, 2^1178571978 is an apocalyptic number.

1178571978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1178571978 is an abundant number, since it is smaller than the sum of its proper divisors (1504361142).

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

1178571978 is a wasteful number, since it uses less digits than its factorization.

1178571978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532379 (or 532373 counting only the distinct ones).

The product of its digits is 987840, while the sum is 54.

The square root of 1178571978 is about 34330.3361183662. The cubic root of 1178571978 is about 1056.2953557873.

The spelling of 1178571978 in words is "one billion, one hundred seventy-eight million, five hundred seventy-one thousand, nine hundred seventy-eight".