381572905 has 16 divisors (see below), whose sum is σ = 554083200. Its totient is φ = 246258432.

The previous prime is 381572903. The next prime is 381572909. The reversal of 381572905 is 509275183.

It is not a de Polignac number, because 381572905 - 2¹ = 381572903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381572903) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 320055 + ... + 321244.

It is an arithmetic number, because the mean of its divisors is an integer number (34630200).

Almost surely, 2^381572905 is an apocalyptic number.

381572905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381572905 is a deficient number, since it is larger than the sum of its proper divisors (172510295).

381572905 is a wasteful number, since it uses less digits than its factorization.

381572905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641328.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 381572905 is about 19533.8911894174. The cubic root of 381572905 is about 725.3136367934.

The spelling of 381572905 in words is "three hundred eighty-one million, five hundred seventy-two thousand, nine hundred five".