381332448 has 120 divisors (see below), whose sum is σ = 1281761712. Its totient is φ = 108946944.

The previous prime is 381332437. The next prime is 381332449. The reversal of 381332448 is 844233183.

It is a happy number.

381332448 is a `hidden beast` number, since 381 + 33 + 244 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381332449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7636 + ... + 28652.

Almost surely, 2^381332448 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 381332448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640880856).

381332448 is an abundant number, since it is smaller than the sum of its proper divisors (900429264).

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

381332448 is a wasteful number, since it uses less digits than its factorization.

381332448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21046 (or 21029 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 381332448 is about 19527.7353525697. The cubic root of 381332448 is about 725.1612470516.

The spelling of 381332448 in words is "three hundred eighty-one million, three hundred thirty-two thousand, four hundred forty-eight".