408646427 has 16 divisors (see below), whose sum is σ = 479102400. Its totient is φ = 348397056.

The previous prime is 408646421. The next prime is 408646429. The reversal of 408646427 is 724646804.

It is not a de Polignac number, because 408646427 - 2⁶ = 408646363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408646421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63113 + ... + 69285.

It is an arithmetic number, because the mean of its divisors is an integer number (29943900).

Almost surely, 2^408646427 is an apocalyptic number.

408646427 is a deficient number, since it is larger than the sum of its proper divisors (70455973).

408646427 is an equidigital number, since it uses as much as digits as its factorization.

408646427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387 (or 6373 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 41.

The square root of 408646427 is about 20215.0049962893. The cubic root of 408646427 is about 742.0774512720.

The spelling of 408646427 in words is "four hundred eight million, six hundred forty-six thousand, four hundred twenty-seven".