388808131 has 4 divisors (see below), whose sum is σ = 391776264. Its totient is φ = 385840000.

The previous prime is 388808093. The next prime is 388808143. The reversal of 388808131 is 131808883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131808883 = 23 ⋅5730821.

It is a cyclic number.

It is not a de Polignac number, because 388808131 - 2¹¹ = 388806083 is a prime.

It is a super-2 number, since 2×388808131² = 302343525463426322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388800131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1483870 + ... + 1484131.

It is an arithmetic number, because the mean of its divisors is an integer number (97944066).

Almost surely, 2^388808131 is an apocalyptic number.

388808131 is a deficient number, since it is larger than the sum of its proper divisors (2968133).

388808131 is a wasteful number, since it uses less digits than its factorization.

388808131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968132.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 388808131 is about 19718.2182511504. The cubic root of 388808131 is about 729.8693273330.

The spelling of 388808131 in words is "three hundred eighty-eight million, eight hundred eight thousand, one hundred thirty-one".