400423852340 has 24 divisors (see below), whose sum is σ = 842887471272. Its totient is φ = 159789087360.

The previous prime is 400423852333. The next prime is 400423852379. The reversal of 400423852340 is 43258324004.

It can be written as a sum of positive squares in 4 ways, for example, as 8612953636 + 391810898704 = 92806^2 + 625948^2 .

It is a super-2 number, since 2×400423852340² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400423852340.

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, 23769719 + ... + 23786558.

It is an arithmetic number, because the mean of its divisors is an integer number (35120311303).

Almost surely, 2^400423852340 is an apocalyptic number.

It is an amenable number.

400423852340 is an abundant number, since it is smaller than the sum of its proper divisors (442463618932).

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

400423852340 is a wasteful number, since it uses less digits than its factorization.

400423852340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47556707 (or 47556705 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The spelling of 400423852340 in words is "four hundred billion, four hundred twenty-three million, eight hundred fifty-two thousand, three hundred forty".