388469655 has 128 divisors (see below), whose sum is σ = 839946240. Its totient is φ = 166510080.

The previous prime is 388469647. The next prime is 388469657. The reversal of 388469655 is 556964883.

It is a happy number.

It is not a de Polignac number, because 388469655 - 2³ = 388469647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388469657) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 1325689 + ... + 1325981.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^388469655 is an apocalyptic number.

388469655 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

388469655 is an abundant number, since it is smaller than the sum of its proper divisors (451476585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388469655 is a wasteful number, since it uses less digits than its factorization.

388469655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 392 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 388469655 is about 19709.6335582375. The cubic root of 388469655 is about 729.6574705043.

The spelling of 388469655 in words is "three hundred eighty-eight million, four hundred sixty-nine thousand, six hundred fifty-five".