408388655 has 8 divisors (see below), whose sum is σ = 490533792. Its totient is φ = 326399328.

The previous prime is 408388649. The next prime is 408388681. The reversal of 408388655 is 556883804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 408388655 - 2²⁰ = 407340079 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 7 ways as a sum of consecutive naturals, for example, 33104 + ... + 43733.

It is an arithmetic number, because the mean of its divisors is an integer number (61316724).

Almost surely, 2^408388655 is an apocalyptic number.

408388655 is a deficient number, since it is larger than the sum of its proper divisors (82145137).

408388655 is a wasteful number, since it uses less digits than its factorization.

408388655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77905.

The product of its (nonzero) digits is 921600, while the sum is 47.

The square root of 408388655 is about 20208.6282315253. The cubic root of 408388655 is about 741.9213856114.

The spelling of 408388655 in words is "four hundred eight million, three hundred eighty-eight thousand, six hundred fifty-five".