381403224 has 72 divisors (see below), whose sum is σ = 1045579860. Its totient is φ = 125600256.

The previous prime is 381403223. The next prime is 381403241. The reversal of 381403224 is 422304183.

381403224 is a `hidden beast` number, since 38 + 1 + 403 + 224 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381403223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 677167 + ... + 677729.

Almost surely, 2^381403224 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 381403224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522789930).

381403224 is an abundant number, since it is smaller than the sum of its proper divisors (664176636).

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

381403224 is a wasteful number, since it uses less digits than its factorization.

381403224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 381403224 is about 19529.5474601948. The cubic root of 381403224 is about 725.2061080277.

The spelling of 381403224 in words is "three hundred eighty-one million, four hundred three thousand, two hundred twenty-four".