381671504 has 40 divisors (see below), whose sum is σ = 765760512. Its totient is φ = 184095360.

The previous prime is 381671503. The next prime is 381671519. The reversal of 381671504 is 405176183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381671503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183977 + ... + 186039.

Almost surely, 2^381671504 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 381671504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382880256).

381671504 is an abundant number, since it is smaller than the sum of its proper divisors (384089008).

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

381671504 is a wasteful number, since it uses less digits than its factorization.

381671504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 381671504 is about 19536.4148195108. The cubic root of 381671504 is about 725.3761054500.

The spelling of 381671504 in words is "three hundred eighty-one million, six hundred seventy-one thousand, five hundred four".