388906818 has 8 divisors (see below), whose sum is σ = 777813648. Its totient is φ = 129635604.

The previous prime is 388906813. The next prime is 388906829. The reversal of 388906818 is 818609883.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

388906818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (388906813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32408896 + ... + 32408907.

It is an arithmetic number, because the mean of its divisors is an integer number (97226706).

Almost surely, 2^388906818 is an apocalyptic number.

388906818 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.

388906818 is a wasteful number, since it uses less digits than its factorization.

388906818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64817808.

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 388906818 is about 19720.7205243622. The cubic root of 388906818 is about 729.9310737449.

The spelling of 388906818 in words is "three hundred eighty-eight million, nine hundred six thousand, eight hundred eighteen".