400450340440 has 32 divisors (see below), whose sum is σ = 913703600160. Its totient is φ = 157924076800.

The previous prime is 400450340413. The next prime is 400450340461. The reversal of 400450340440 is 44043054004.

It is a junction number, because it is equal to n+sod(n) for n = 400450340399 and 400450340408.

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, 70498981 + ... + 70504660.

It is an arithmetic number, because the mean of its divisors is an integer number (28553237505).

Almost surely, 2^400450340440 is an apocalyptic number.

400450340440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400450340440 is an abundant number, since it is smaller than the sum of its proper divisors (513253259720).

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

400450340440 is a wasteful number, since it uses less digits than its factorization.

400450340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141003723 (or 141003719 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

Adding to 400450340440 its reverse (44043054004), we get a palindrome (444493394444).

The spelling of 400450340440 in words is "four hundred billion, four hundred fifty million, three hundred forty thousand, four hundred forty".