400163600 has 30 divisors (see below), whose sum is σ = 961394010. Its totient is φ = 160065280.

The previous prime is 400163587. The next prime is 400163609. The reversal of 400163600 is 6361004.

It can be written as a sum of positive squares in 3 ways, for example, as 114147856 + 286015744 = 10684^2 + 16912^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (400163609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 499805 + ... + 500604.

It is an arithmetic number, because the mean of its divisors is an integer number (32046467).

Almost surely, 2^400163600 is an apocalyptic number.

400163600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400163600 is an abundant number, since it is smaller than the sum of its proper divisors (561230410).

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

400163600 is a wasteful number, since it uses less digits than its factorization.

400163600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000427 (or 1000416 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 400163600 is about 20004.0895818830. The cubic root of 400163600 is about 736.9067372952.

The spelling of 400163600 in words is "four hundred million, one hundred sixty-three thousand, six hundred".