381553472 has 56 divisors (see below), whose sum is σ = 791077920. Its totient is φ = 182407680.

The previous prime is 381553451. The next prime is 381553481. The reversal of 381553472 is 274355183.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138347 + ... + 141077.

Almost surely, 2^381553472 is an apocalyptic number.

381553472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381553472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395538960).

381553472 is an abundant number, since it is smaller than the sum of its proper divisors (409524448).

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

381553472 is a wasteful number, since it uses less digits than its factorization.

381553472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839 (or 2829 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 381553472 is about 19533.3937655493. The cubic root of 381553472 is about 725.3013234985.

The spelling of 381553472 in words is "three hundred eighty-one million, five hundred fifty-three thousand, four hundred seventy-two".