404390475 has 90 divisors (see below), whose sum is σ = 796877444. Its totient is φ = 202694400.

The previous prime is 404390431. The next prime is 404390489. The reversal of 404390475 is 574093404.

It is not a de Polignac number, because 404390475 - 2⁹ = 404389963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 584880 + ... + 585570.

Almost surely, 2^404390475 is an apocalyptic number.

404390475 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

404390475 is a deficient number, since it is larger than the sum of its proper divisors (392486969).

404390475 is a wasteful number, since it uses less digits than its factorization.

404390475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 404390475 is about 20109.4623249852. The cubic root of 404390475 is about 739.4922710250.

The spelling of 404390475 in words is "four hundred four million, three hundred ninety thousand, four hundred seventy-five".