11808787388 has 12 divisors (see below), whose sum is σ = 20668418232. Its totient is φ = 5903525040.

The previous prime is 11808787349. The next prime is 11808787421. The reversal of 11808787388 is 88378780811.

It is a congruent 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, 186083 + ... + 241338.

It is an arithmetic number, because the mean of its divisors is an integer number (1722368186).

Almost surely, 2^11808787388 is an apocalyptic number.

It is an amenable number.

11808787388 is a deficient number, since it is larger than the sum of its proper divisors (8859630844).

11808787388 is a wasteful number, since it uses less digits than its factorization.

11808787388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434332 (or 434330 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 59.

The spelling of 11808787388 in words is "eleven billion, eight hundred eight million, seven hundred eighty-seven thousand, three hundred eighty-eight".