387844128 has 72 divisors (see below), whose sum is σ = 1260499968. Its totient is φ = 110812032.

The previous prime is 387844117. The next prime is 387844129. The reversal of 387844128 is 821448783.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (387844129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94176 + ... + 98207.

It is an arithmetic number, because the mean of its divisors is an integer number (17506944).

Almost surely, 2^387844128 is an apocalyptic number.

It is an amenable number.

387844128 is an abundant number, since it is smaller than the sum of its proper divisors (872655840).

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

387844128 is a wasteful number, since it uses less digits than its factorization.

387844128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192406 (or 192395 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 387844128 is about 19693.7586052028. The cubic root of 387844128 is about 729.2656203788.

The spelling of 387844128 in words is "three hundred eighty-seven million, eight hundred forty-four thousand, one hundred twenty-eight".