400605346648 has 32 divisors (see below), whose sum is σ = 813383822160. Its totient is φ = 183873248640.

The previous prime is 400605346577. The next prime is 400605346679. The reversal of 400605346648 is 846643506004.

It is a junction number, because it is equal to n+sod(n) for n = 400605346598 and 400605346607.

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, 10621990 + ... + 10659637.

Almost surely, 2^400605346648 is an apocalyptic number.

It is an amenable number.

400605346648 is an abundant number, since it is smaller than the sum of its proper divisors (412778475512).

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

400605346648 is a wasteful number, since it uses less digits than its factorization.

400605346648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21281827 (or 21281823 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

It can be divided in two parts, 400605 and 346648, that added together give a triangular number (747253 = T₁₂₂₂).

The spelling of 400605346648 in words is "four hundred billion, six hundred five million, three hundred forty-six thousand, six hundred forty-eight".