381794409 has 12 divisors (see below), whose sum is σ = 556541700. Its totient is φ = 252193824.

The previous prime is 381794393. The next prime is 381794429. The reversal of 381794409 is 904497183.

381794409 is a `hidden beast` number, since 38 + 179 + 440 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 227165184 + 154629225 = 15072^2 + 12435^2 .

It is not a de Polignac number, because 381794409 - 2⁴ = 381794393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381794429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193614 + ... + 195575.

It is an arithmetic number, because the mean of its divisors is an integer number (46378475).

Almost surely, 2^381794409 is an apocalyptic number.

It is an amenable number.

381794409 is a deficient number, since it is larger than the sum of its proper divisors (174747291).

381794409 is a wasteful number, since it uses less digits than its factorization.

381794409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389304 (or 389301 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 381794409 is about 19539.5601025202. The cubic root of 381794409 is about 725.4539584217.

The spelling of 381794409 in words is "three hundred eighty-one million, seven hundred ninety-four thousand, four hundred nine".