408248381 has 4 divisors (see below), whose sum is σ = 409060512. Its totient is φ = 407436252.

The previous prime is 408248369. The next prime is 408248389. The reversal of 408248381 is 183842804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408248381 is a prime.

It is a super-2 number, since 2×408248381² = 333333481178242322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408248389) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 405311 + ... + 406316.

It is an arithmetic number, because the mean of its divisors is an integer number (102265128).

Almost surely, 2^408248381 is an apocalyptic number.

It is an amenable number.

408248381 is a deficient number, since it is larger than the sum of its proper divisors (812131).

408248381 is an equidigital number, since it uses as much as digits as its factorization.

408248381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812130.

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 408248381 is about 20205.1572871878. The cubic root of 408248381 is about 741.8364304288.

The spelling of 408248381 in words is "four hundred eight million, two hundred forty-eight thousand, three hundred eighty-one".