388409424 has 80 divisors (see below), whose sum is σ = 1109845632. Its totient is φ = 116273664.

The previous prime is 388409407. The next prime is 388409443. The reversal of 388409424 is 424904883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14677 + ... + 31499.

Almost surely, 2^388409424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388409424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554922816).

388409424 is an abundant number, since it is smaller than the sum of its proper divisors (721436208).

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

388409424 is a wasteful number, since it uses less digits than its factorization.

388409424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16884 (or 16878 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 388409424 is about 19708.1055406145. The cubic root of 388409424 is about 729.6197581888.

The spelling of 388409424 in words is "three hundred eighty-eight million, four hundred nine thousand, four hundred twenty-four".