388740055 has 16 divisors (see below), whose sum is σ = 519727104. Its totient is φ = 276702880.

The previous prime is 388739993. The next prime is 388740059. The reversal of 388740055 is 550047883.

It is not a de Polignac number, because 388740055 - 2⁷ = 388739927 is a prime.

It is a super-2 number, since 2×388740055² = 302237660722806050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388740059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72607 + ... + 77776.

It is an arithmetic number, because the mean of its divisors is an integer number (32482944).

Almost surely, 2^388740055 is an apocalyptic number.

388740055 is a deficient number, since it is larger than the sum of its proper divisors (130987049).

388740055 is a wasteful number, since it uses less digits than its factorization.

388740055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150446.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 388740055 is about 19716.4919547063. The cubic root of 388740055 is about 729.8267274999.

The spelling of 388740055 in words is "three hundred eighty-eight million, seven hundred forty thousand, fifty-five".