388033921 has 8 divisors (see below), whose sum is σ = 426542688. Its totient is φ = 350064000.

The previous prime is 388033901. The next prime is 388033931. The reversal of 388033921 is 129330883.

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

It is not a de Polignac number, because 388033921 - 2²¹ = 385936769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388033901) 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 7 ways as a sum of consecutive naturals, for example, 133200 + ... + 136081.

It is an arithmetic number, because the mean of its divisors is an integer number (53317836).

Almost surely, 2^388033921 is an apocalyptic number.

It is an amenable number.

388033921 is a deficient number, since it is larger than the sum of its proper divisors (38508767).

388033921 is a wasteful number, since it uses less digits than its factorization.

388033921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269423.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 388033921 is about 19698.5766237056. The cubic root of 388033921 is about 729.3845572824.

It can be divided in two parts, 38803 and 3921, that added together give a palindrome (42724).

The spelling of 388033921 in words is "three hundred eighty-eight million, thirty-three thousand, nine hundred twenty-one".