405670255 has 4 divisors (see below), whose sum is σ = 486804312. Its totient is φ = 324536200.

The previous prime is 405670211. The next prime is 405670261. The reversal of 405670255 is 552076504.

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

It is not a de Polignac number, because 405670255 - 2²⁵ = 372115823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405670255.

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, 40567021 + ... + 40567030.

It is an arithmetic number, because the mean of its divisors is an integer number (121701078).

Almost surely, 2^405670255 is an apocalyptic number.

405670255 is a deficient number, since it is larger than the sum of its proper divisors (81134057).

405670255 is an equidigital number, since it uses as much as digits as its factorization.

405670255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81134056.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 405670255 is about 20141.2575327361. The cubic root of 405670255 is about 740.2715432716.

The spelling of 405670255 in words is "four hundred five million, six hundred seventy thousand, two hundred fifty-five".