388949011 has 4 divisors (see below), whose sum is σ = 424308024. Its totient is φ = 353590000.

The previous prime is 388949009. The next prime is 388949023. The reversal of 388949011 is 110949883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 388949011 - 2¹ = 388949009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388989011) 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, 17679490 + ... + 17679511.

It is an arithmetic number, because the mean of its divisors is an integer number (106077006).

Almost surely, 2^388949011 is an apocalyptic number.

388949011 is a deficient number, since it is larger than the sum of its proper divisors (35359013).

388949011 is a wasteful number, since it uses less digits than its factorization.

388949011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35359012.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 388949011 is about 19721.7902584933. The cubic root of 388949011 is about 729.9574698435.

It can be divided in two parts, 3889 and 49011, that added together give a square (52900 = 230²).

The spelling of 388949011 in words is "three hundred eighty-eight million, nine hundred forty-nine thousand, eleven".