400505203450 has 48 divisors (see below), whose sum is σ = 823793898816. Its totient is φ = 143643196800.

The previous prime is 400505203447. The next prime is 400505203471. The reversal of 400505203450 is 54302505004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4947462 + ... + 5027761.

It is an arithmetic number, because the mean of its divisors is an integer number (17162372892).

Almost surely, 2^400505203450 is an apocalyptic number.

400505203450 is an abundant number, since it is smaller than the sum of its proper divisors (423288695366).

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

400505203450 is a wasteful number, since it uses less digits than its factorization.

400505203450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9975319 (or 9975314 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 400505203450 its reverse (54302505004), we get a palindrome (454807708454).

The spelling of 400505203450 in words is "four hundred billion, five hundred five million, two hundred three thousand, four hundred fifty".