381690648 has 96 divisors (see below), whose sum is σ = 1065355200. Its totient is φ = 123379200.

The previous prime is 381690629. The next prime is 381690649. The reversal of 381690648 is 846096183.

It is a super-3 number, since 3×381690648³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381690649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 705258 + ... + 705798.

It is an arithmetic number, because the mean of its divisors is an integer number (11097450).

Almost surely, 2^381690648 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 381690648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532677600).

381690648 is an abundant number, since it is smaller than the sum of its proper divisors (683664552).

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

381690648 is a wasteful number, since it uses less digits than its factorization.

381690648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 381690648 is about 19536.9047702035. The cubic root of 381690648 is about 725.3882331286.

The spelling of 381690648 in words is "three hundred eighty-one million, six hundred ninety thousand, six hundred forty-eight".