400243332 has 24 divisors (see below), whose sum is σ = 974506176. Its totient is φ = 127613728.

The previous prime is 400243331. The next prime is 400243339. The reversal of 400243332 is 233342004.

It is a junction number, because it is equal to n+sod(n) for n = 400243299 and 400243308.

It is not an unprimeable number, because it can be changed into a prime (400243331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724803 + ... + 725354.

It is an arithmetic number, because the mean of its divisors is an integer number (40604424).

Almost surely, 2^400243332 is an apocalyptic number.

It is an amenable number.

400243332 is an abundant number, since it is smaller than the sum of its proper divisors (574262844).

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

400243332 is a wasteful number, since it uses less digits than its factorization.

400243332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450187 (or 1450185 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 400243332 is about 20006.0823751178. The cubic root of 400243332 is about 736.9556765675.

Adding to 400243332 its reverse (233342004), we get a palindrome (633585336).

The spelling of 400243332 in words is "four hundred million, two hundred forty-three thousand, three hundred thirty-two".