400445200240 has 40 divisors (see below), whose sum is σ = 971514881568. Its totient is φ = 153213815040.

The previous prime is 400445200237. The next prime is 400445200279. The reversal of 400445200240 is 42002544004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108814791 + ... + 108818470.

Almost surely, 2^400445200240 is an apocalyptic number.

400445200240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400445200240 is an abundant number, since it is smaller than the sum of its proper divisors (571069681328).

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

400445200240 is a wasteful number, since it uses less digits than its factorization.

400445200240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217633297 (or 217633291 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 400445200240 its reverse (42002544004), we get a palindrome (442447744244).

The spelling of 400445200240 in words is "four hundred billion, four hundred forty-five million, two hundred thousand, two hundred forty".