2117147788 has 12 divisors (see below), whose sum is σ = 4234295632. Its totient is φ = 907349040.

The previous prime is 2117147779. The next prime is 2117147833. The reversal of 2117147788 is 8877417112.

2117147788 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37806183 + ... + 37806238.

Almost surely, 2^2117147788 is an apocalyptic number.

2117147788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2117147788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2117147788 is a wasteful number, since it uses less digits than its factorization.

2117147788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75612432 (or 75612430 counting only the distinct ones).

The product of its digits is 175616, while the sum is 46.

The square root of 2117147788 is about 46012.4742651381. The cubic root of 2117147788 is about 1284.0552919516.

The spelling of 2117147788 in words is "two billion, one hundred seventeen million, one hundred forty-seven thousand, seven hundred eighty-eight".