408424655 has 4 divisors (see below), whose sum is σ = 490109592. Its totient is φ = 326739720.

The previous prime is 408424637. The next prime is 408424663. The reversal of 408424655 is 556424804.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 408424655 - 2¹⁸ = 408162511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40842461 + ... + 40842470.

It is an arithmetic number, because the mean of its divisors is an integer number (122527398).

Almost surely, 2^408424655 is an apocalyptic number.

408424655 is a deficient number, since it is larger than the sum of its proper divisors (81684937).

408424655 is an equidigital number, since it uses as much as digits as its factorization.

408424655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81684936.

The product of its (nonzero) digits is 153600, while the sum is 38.

The square root of 408424655 is about 20209.5189205483. The cubic root of 408424655 is about 741.9431854213.

The spelling of 408424655 in words is "four hundred eight million, four hundred twenty-four thousand, six hundred fifty-five".