400440204200 has 24 divisors (see below), whose sum is σ = 931023475230. Its totient is φ = 160176081600.

The previous prime is 400440204179. The next prime is 400440204217. The reversal of 400440204200 is 2402044004.

It can be written as a sum of positive squares in 3 ways, for example, as 367859232196 + 32580972004 = 606514^2 + 180502^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1001100311 + ... + 1001100710.

Almost surely, 2^400440204200 is an apocalyptic number.

400440204200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400440204200 is an abundant number, since it is smaller than the sum of its proper divisors (530583271030).

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

400440204200 is a wasteful number, since it uses less digits than its factorization.

400440204200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002201037 (or 2002201028 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 400440204200 its reverse (2402044004), we get a palindrome (402842248204).

The spelling of 400440204200 in words is "four hundred billion, four hundred forty million, two hundred four thousand, two hundred".