400434243444220 has 12 divisors (see below), whose sum is σ = 840911911232904. Its totient is φ = 160173697377680.

The previous prime is 400434243444217. The next prime is 400434243444239. The reversal of 400434243444220 is 22444342434004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10010856086086 + ... + 10010856086125.

It is an arithmetic number, because the mean of its divisors is an integer number (70075992602742).

Almost surely, 2^{400434243444220} is an apocalyptic number.

It is an amenable number.

400434243444220 is an abundant number, since it is smaller than the sum of its proper divisors (440477667788684).

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

400434243444220 is a wasteful number, since it uses less digits than its factorization.

400434243444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20021712172220 (or 20021712172218 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 40.

Adding to 400434243444220 its reverse (22444342434004), we get a palindrome (422878585878224).

The spelling of 400434243444220 in words is "four hundred trillion, four hundred thirty-four billion, two hundred forty-three million, four hundred forty-four thousand, two hundred twenty".