381556572 has 12 divisors (see below), whose sum is σ = 890298696. Its totient is φ = 127185520.

The previous prime is 381556559. The next prime is 381556583. The reversal of 381556572 is 275655183.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 15898179 + ... + 15898202.

It is an arithmetic number, because the mean of its divisors is an integer number (74191558).

Almost surely, 2^381556572 is an apocalyptic number.

It is an amenable number.

381556572 is an abundant number, since it is smaller than the sum of its proper divisors (508742124).

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

381556572 is a wasteful number, since it uses less digits than its factorization.

381556572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31796388 (or 31796386 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The square root of 381556572 is about 19533.4731166785. The cubic root of 381556572 is about 725.3032877736.

The spelling of 381556572 in words is "three hundred eighty-one million, five hundred fifty-six thousand, five hundred seventy-two".