400012043124 has 48 divisors (see below), whose sum is σ = 936629203328. Its totient is φ = 132870786048.

The previous prime is 400012043087. The next prime is 400012043143. The reversal of 400012043124 is 421340210004.

It is a self number, because there is not a number n which added to its sum of digits gives 400012043124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13871529 + ... + 13900335.

Almost surely, 2^400012043124 is an apocalyptic number.

It is an amenable number.

400012043124 is an abundant number, since it is smaller than the sum of its proper divisors (536617160204).

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

400012043124 is a wasteful number, since it uses less digits than its factorization.

400012043124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32824 (or 32822 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 400012043124 its reverse (421340210004), we get a palindrome (821352253128).

The spelling of 400012043124 in words is "four hundred billion, twelve million, forty-three thousand, one hundred twenty-four".