405485775 has 72 divisors (see below), whose sum is σ = 760799520. Its totient is φ = 206219520.

The previous prime is 405485771. The next prime is 405485789. The reversal of 405485775 is 577584504.

It is not a de Polignac number, because 405485775 - 2² = 405485771 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 405485775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405485771) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 440766 + ... + 441684.

It is an arithmetic number, because the mean of its divisors is an integer number (10566660).

Almost surely, 2^405485775 is an apocalyptic number.

405485775 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

405485775 is a deficient number, since it is larger than the sum of its proper divisors (355313745).

405485775 is a wasteful number, since it uses less digits than its factorization.

405485775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 784000, while the sum is 45.

The square root of 405485775 is about 20136.6773574987. The cubic root of 405485775 is about 740.1593125464.

The spelling of 405485775 in words is "four hundred five million, four hundred eighty-five thousand, seven hundred seventy-five".