400024244 has 6 divisors (see below), whose sum is σ = 700042434. Its totient is φ = 200012120.

The previous prime is 400024241. The next prime is 400024283. The reversal of 400024244 is 442420004.

It can be written as a sum of positive squares in only one way, i.e., 399520144 + 504100 = 19988^2 + 710^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400024241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50003027 + ... + 50003034.

It is an arithmetic number, because the mean of its divisors is an integer number (116673739).

Almost surely, 2^400024244 is an apocalyptic number.

It is an amenable number.

400024244 is a deficient number, since it is larger than the sum of its proper divisors (300018190).

400024244 is a wasteful number, since it uses less digits than its factorization.

400024244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100006065 (or 100006063 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400024244 is about 20000.6060908163. The cubic root of 400024244 is about 736.8211853706.

Adding to 400024244 its reverse (442420004), we get a palindrome (842444248).

The spelling of 400024244 in words is "four hundred million, twenty-four thousand, two hundred forty-four".