400940200 has 24 divisors (see below), whose sum is σ = 932186430. Its totient is φ = 160376000.

The previous prime is 400940171. The next prime is 400940231. The reversal of 400940200 is 2049004.

It can be written as a sum of positive squares in 3 ways, for example, as 324936676 + 76003524 = 18026^2 + 8718^2 .

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 5 ways as a sum of consecutive naturals, for example, 1002151 + ... + 1002550.

Almost surely, 2^400940200 is an apocalyptic number.

400940200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400940200 is an abundant number, since it is smaller than the sum of its proper divisors (531246230).

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

400940200 is a wasteful number, since it uses less digits than its factorization.

400940200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004717 (or 2004708 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 400940200 is about 20023.4912040833. The cubic root of 400940200 is about 737.3831357487.

Adding to 400940200 its reverse (2049004), we get a palindrome (402989204).

The spelling of 400940200 in words is "four hundred million, nine hundred forty thousand, two hundred".