400354228660 has 24 divisors (see below), whose sum is σ = 841229090856. Its totient is φ = 160049270400.

The previous prime is 400354228657. The next prime is 400354228661. The reversal of 400354228660 is 66822453004.

It can be written as a sum of positive squares in 4 ways, for example, as 75307684 + 400278920976 = 8678^2 + 632676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400354228661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5740791 + ... + 5810110.

It is an arithmetic number, because the mean of its divisors is an integer number (35051212119).

Almost surely, 2^400354228660 is an apocalyptic number.

It is an amenable number.

400354228660 is an abundant number, since it is smaller than the sum of its proper divisors (440874862196).

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

400354228660 is a wasteful number, since it uses less digits than its factorization.

400354228660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552643 (or 11552641 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 400354228660 in words is "four hundred billion, three hundred fifty-four million, two hundred twenty-eight thousand, six hundred sixty".