388439478 has 48 divisors (see below), whose sum is σ = 966794400. Its totient is φ = 110412288.

The previous prime is 388439473. The next prime is 388439483. The reversal of 388439478 is 874934883.

It is an interprime number because it is at equal distance from previous prime (388439473) and next prime (388439483).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388439473) 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 23 ways as a sum of consecutive naturals, for example, 16998 + ... + 32646.

It is an arithmetic number, because the mean of its divisors is an integer number (20141550).

Almost surely, 2^388439478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388439478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483397200).

388439478 is an abundant number, since it is smaller than the sum of its proper divisors (578354922).

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

388439478 is a wasteful number, since it uses less digits than its factorization.

388439478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861 (or 15858 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 388439478 is about 19708.8680040230. The cubic root of 388439478 is about 729.6385763270.

The spelling of 388439478 in words is "three hundred eighty-eight million, four hundred thirty-nine thousand, four hundred seventy-eight".