400003680560 has 160 divisors (see below), whose sum is σ = 1024480714752. Its totient is φ = 144037232640.

The previous prime is 400003680551. The next prime is 400003680617. The reversal of 400003680560 is 65086300004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64482419 + ... + 64488621.

Almost surely, 2^400003680560 is an apocalyptic number.

400003680560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400003680560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512240357376).

400003680560 is an abundant number, since it is smaller than the sum of its proper divisors (624477034192).

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

400003680560 is a wasteful number, since it uses less digits than its factorization.

400003680560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931 (or 6925 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 400003680560 its reverse (65086300004), we get a palindrome (465089980564).

The spelling of 400003680560 in words is "four hundred billion, three million, six hundred eighty thousand, five hundred sixty".