400163405 has 8 divisors (see below), whose sum is σ = 490413312. Its totient is φ = 313319248.

The previous prime is 400163383. The next prime is 400163417. The reversal of 400163405 is 504361004.

It is a happy number.

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 400163405 - 2⁸ = 400163149 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, 851177 + ... + 851646.

It is an arithmetic number, because the mean of its divisors is an integer number (61301664).

Almost surely, 2^400163405 is an apocalyptic number.

It is an amenable number.

400163405 is a deficient number, since it is larger than the sum of its proper divisors (90249907).

400163405 is a wasteful number, since it uses less digits than its factorization.

400163405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702875.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 400163405 is about 20004.0847078790. The cubic root of 400163405 is about 736.9066175968.

The spelling of 400163405 in words is "four hundred million, one hundred sixty-three thousand, four hundred five".