409308381 has 12 divisors (see below), whose sum is σ = 594528480. Its totient is φ = 271346760.

The previous prime is 409308379. The next prime is 409308451. The reversal of 409308381 is 183803904.

It is not a de Polignac number, because 409308381 - 2¹ = 409308379 is a prime.

It is a super-2 number, since 2×409308381² = 335066701513682322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409308331) 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, 125425 + ... + 128646.

It is an arithmetic number, because the mean of its divisors is an integer number (49544040).

Almost surely, 2^409308381 is an apocalyptic number.

It is an amenable number.

409308381 is a deficient number, since it is larger than the sum of its proper divisors (185220099).

409308381 is a wasteful number, since it uses less digits than its factorization.

409308381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254256 (or 254253 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 409308381 is about 20231.3712090901. The cubic root of 409308381 is about 742.4779247255.

The spelling of 409308381 in words is "four hundred nine million, three hundred eight thousand, three hundred eighty-one".