381446648 has 32 divisors (see below), whose sum is σ = 791233920. Its totient is φ = 170940000.

The previous prime is 381446633. The next prime is 381446677. The reversal of 381446648 is 846644183.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 381446599 and 381446608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24278 + ... + 36773.

It is an arithmetic number, because the mean of its divisors is an integer number (24726060).

Almost surely, 2^381446648 is an apocalyptic number.

It is an amenable number.

381446648 is an abundant number, since it is smaller than the sum of its proper divisors (409787272).

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

381446648 is a wasteful number, since it uses less digits than its factorization.

381446648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61139 (or 61135 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 381446648 is about 19530.6591798638. The cubic root of 381446648 is about 725.2336293428.

The spelling of 381446648 in words is "three hundred eighty-one million, four hundred forty-six thousand, six hundred forty-eight".