400135244 has 6 divisors (see below), whose sum is σ = 700236684. Its totient is φ = 200067620.

The previous prime is 400135207. The next prime is 400135291. The reversal of 400135244 is 442531004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50016902 + ... + 50016909.

It is an arithmetic number, because the mean of its divisors is an integer number (116706114).

Almost surely, 2^400135244 is an apocalyptic number.

It is an amenable number.

400135244 is a deficient number, since it is larger than the sum of its proper divisors (300101440).

400135244 is a wasteful number, since it uses less digits than its factorization.

400135244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100033815 (or 100033813 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400135244 is about 20003.3808142524. The cubic root of 400135244 is about 736.8893308969.

Adding to 400135244 its reverse (442531004), we get a palindrome (842666248).

The spelling of 400135244 in words is "four hundred million, one hundred thirty-five thousand, two hundred forty-four".