400163172 has 24 divisors (see below), whose sum is σ = 949022592. Its totient is φ = 131200800.

The previous prime is 400163167. The next prime is 400163173. The reversal of 400163172 is 271361004.

It is not an unprimeable number, because it can be changed into a prime (400163173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272604 + ... + 274067.

It is an arithmetic number, because the mean of its divisors is an integer number (39542608).

Almost surely, 2^400163172 is an apocalyptic number.

It is an amenable number.

400163172 is an abundant number, since it is smaller than the sum of its proper divisors (548859420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400163172 is a wasteful number, since it uses less digits than its factorization.

400163172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546739 (or 546737 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 400163172 is about 20004.0788840676. The cubic root of 400163172 is about 736.9064745725.

The spelling of 400163172 in words is "four hundred million, one hundred sixty-three thousand, one hundred seventy-two".