400243344030 has 96 divisors (see below), whose sum is σ = 1050013838016. Its totient is φ = 105773617152.

The previous prime is 400243343999. The next prime is 400243344037. The reversal of 400243344030 is 30443342004.

It is a junction number, because it is equal to n+sod(n) for n = 400243343985 and 400243344003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400243344037) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4524504 + ... + 4612116.

It is an arithmetic number, because the mean of its divisors is an integer number (10937644146).

Almost surely, 2^400243344030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400243344030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525006919008).

400243344030 is an abundant number, since it is smaller than the sum of its proper divisors (649770493986).

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

400243344030 is a wasteful number, since it uses less digits than its factorization.

400243344030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88082 (or 88079 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 400243344030 its reverse (30443342004), we get a palindrome (430686686034).

The spelling of 400243344030 in words is "four hundred billion, two hundred forty-three million, three hundred forty-four thousand, thirty".