388469887 has 4 divisors (see below), whose sum is σ = 418352200. Its totient is φ = 358587576.

The previous prime is 388469881. The next prime is 388469891. The reversal of 388469887 is 788964883.

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 388469887 - 2¹¹ = 388467839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388469881) 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, 14941137 + ... + 14941162.

It is an arithmetic number, because the mean of its divisors is an integer number (104588050).

Almost surely, 2^388469887 is an apocalyptic number.

388469887 is a deficient number, since it is larger than the sum of its proper divisors (29882313).

388469887 is a wasteful number, since it uses less digits than its factorization.

388469887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29882312.

The product of its digits is 18579456, while the sum is 61.

The square root of 388469887 is about 19709.6394436834. The cubic root of 388469887 is about 729.6576157585.

The spelling of 388469887 in words is "three hundred eighty-eight million, four hundred sixty-nine thousand, eight hundred eighty-seven".