388406942 has 32 divisors (see below), whose sum is σ = 731289600. Its totient is φ = 150302880.

The previous prime is 388406891. The next prime is 388406983. The reversal of 388406942 is 249604883.

It is a junction number, because it is equal to n+sod(n) for n = 388406893 and 388406902.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14483 + ... + 31409.

It is an arithmetic number, because the mean of its divisors is an integer number (22852800).

Almost surely, 2^388406942 is an apocalyptic number.

388406942 is a deficient number, since it is larger than the sum of its proper divisors (342882658).

388406942 is a wasteful number, since it uses less digits than its factorization.

388406942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17096.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 388406942 is about 19708.0425714986. The cubic root of 388406942 is about 729.6182040554.

The spelling of 388406942 in words is "three hundred eighty-eight million, four hundred six thousand, nine hundred forty-two".