388909132 has 12 divisors (see below), whose sum is σ = 685787256. Its totient is φ = 192969920.

The previous prime is 388909127. The next prime is 388909133. The reversal of 388909132 is 231909883.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (388909133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370573 + ... + 371620.

It is an arithmetic number, because the mean of its divisors is an integer number (57148938).

Almost surely, 2^388909132 is an apocalyptic number.

It is an amenable number.

388909132 is a deficient number, since it is larger than the sum of its proper divisors (296878124).

388909132 is a wasteful number, since it uses less digits than its factorization.

388909132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742328 (or 742326 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 388909132 is about 19720.7791935309. The cubic root of 388909132 is about 729.9325214415.

The spelling of 388909132 in words is "three hundred eighty-eight million, nine hundred nine thousand, one hundred thirty-two".