400163830 has 32 divisors (see below), whose sum is σ = 787213728. Its totient is φ = 145248000.

The previous prime is 400163801. The next prime is 400163857. The reversal of 400163830 is 38361004.

It is a junction number, because it is equal to n+sod(n) for n = 400163795 and 400163804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63084 + ... + 69136.

It is an arithmetic number, because the mean of its divisors is an integer number (24600429).

Almost surely, 2^400163830 is an apocalyptic number.

400163830 is a deficient number, since it is larger than the sum of its proper divisors (387049898).

400163830 is a wasteful number, since it uses less digits than its factorization.

400163830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6672.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 400163830 is about 20004.0953307067. The cubic root of 400163830 is about 736.9068784779.

The spelling of 400163830 in words is "four hundred million, one hundred sixty-three thousand, eight hundred thirty".