400243232 has 48 divisors (see below), whose sum is σ = 824689152. Its totient is φ = 190978560.

The previous prime is 400243229. The next prime is 400243241. The reversal of 400243232 is 232342004.

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, 69653 + ... + 75179.

It is an arithmetic number, because the mean of its divisors is an integer number (17181024).

Almost surely, 2^400243232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400243232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412344576).

400243232 is an abundant number, since it is smaller than the sum of its proper divisors (424445920).

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

400243232 is a wasteful number, since it uses less digits than its factorization.

400243232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641 (or 5633 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400243232 is about 20006.0798758777. The cubic root of 400243232 is about 736.9556151918.

Adding to 400243232 its reverse (232342004), we get a palindrome (632585236).

The spelling of 400243232 in words is "four hundred million, two hundred forty-three thousand, two hundred thirty-two".