5185381788 has 18 divisors (see below), whose sum is σ = 13107492944. Its totient is φ = 1728460584.

The previous prime is 5185381783. The next prime is 5185381819. The reversal of 5185381788 is 8871835815.

5185381788 is a `hidden beast` number, since 5 + 18 + 538 + 17 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5185381783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72019156 + ... + 72019227.

Almost surely, 2^5185381788 is an apocalyptic number.

It is an amenable number.

5185381788 is an abundant number, since it is smaller than the sum of its proper divisors (7922111156).

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

5185381788 is a wasteful number, since it uses less digits than its factorization.

5185381788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144038393 (or 144038388 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 54.

The square root of 5185381788 is about 72009.5951106517. The cubic root of 5185381788 is about 1730.8532425563.

The spelling of 5185381788 in words is "five billion, one hundred eighty-five million, three hundred eighty-one thousand, seven hundred eighty-eight".