400400444022 has 16 divisors (see below), whose sum is σ = 800910719472. Its totient is φ = 133448509440.

The previous prime is 400400443999. The next prime is 400400444063. The reversal of 400400444022 is 220444004004.

It is a junction number, because it is equal to n+sod(n) for n = 400400443983 and 400400444001.

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, 4528879 + ... + 4616442.

It is an arithmetic number, because the mean of its divisors is an integer number (50056919967).

Almost surely, 2^400400444022 is an apocalyptic number.

400400444022 is an abundant number, since it is smaller than the sum of its proper divisors (400510275450).

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

400400444022 is a wasteful number, since it uses less digits than its factorization.

400400444022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9152623.

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400400444022 its reverse (220444004004), we get a palindrome (620844448026).

The spelling of 400400444022 in words is "four hundred billion, four hundred million, four hundred forty-four thousand, twenty-two".