381988608 has 108 divisors (see below), whose sum is σ = 1044708840. Its totient is φ = 123906048.

The previous prime is 381988601. The next prime is 381988613. The reversal of 381988608 is 806889183.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381988601) 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, 1419898 + ... + 1420166.

It is an arithmetic number, because the mean of its divisors is an integer number (9673230).

Almost surely, 2^381988608 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 381988608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522354420).

381988608 is an abundant number, since it is smaller than the sum of its proper divisors (662720232).

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

381988608 is an equidigital number, since it uses as much as digits as its factorization.

381988608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 381988608 is about 19544.5288508063. The cubic root of 381988608 is about 725.5769378317.

The spelling of 381988608 in words is "three hundred eighty-one million, nine hundred eighty-eight thousand, six hundred eight".