388900005 has 32 divisors (see below), whose sum is σ = 693221760. Its totient is φ = 184853760.

The previous prime is 388899997. The next prime is 388900019. The reversal of 388900005 is 500009883.

It is not a de Polignac number, because 388900005 - 2³ = 388899997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28731 + ... + 40040.

It is an arithmetic number, because the mean of its divisors is an integer number (21663180).

Almost surely, 2^388900005 is an apocalyptic number.

It is an amenable number.

388900005 is a deficient number, since it is larger than the sum of its proper divisors (304321755).

388900005 is a wasteful number, since it uses less digits than its factorization.

388900005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68821.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 388900005 is about 19720.5477865094. The cubic root of 388900005 is about 729.9268113276.

Adding to 388900005 its reverse (500009883), we get a palindrome (888909888).

The spelling of 388900005 in words is "three hundred eighty-eight million, nine hundred thousand, five".