388449236 has 48 divisors (see below), whose sum is σ = 809286912. Its totient is φ = 159667200.

The previous prime is 388449179. The next prime is 388449283. The reversal of 388449236 is 632944883.

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, 70916 + ... + 76196.

It is an arithmetic number, because the mean of its divisors is an integer number (16860144).

Almost surely, 2^388449236 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 388449236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404643456).

388449236 is an abundant number, since it is smaller than the sum of its proper divisors (420837676).

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

388449236 is a wasteful number, since it uses less digits than its factorization.

388449236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400 (or 5398 counting only the distinct ones).

The product of its digits is 995328, while the sum is 47.

The square root of 388449236 is about 19709.1155560061. The cubic root of 388449236 is about 729.6446860335.

The spelling of 388449236 in words is "three hundred eighty-eight million, four hundred forty-nine thousand, two hundred thirty-six".