400240255 has 8 divisors (see below), whose sum is σ = 480513600. Its totient is φ = 320042016.

The previous prime is 400240249. The next prime is 400240279. The reversal of 400240255 is 552042004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400240255 - 2¹⁵ = 400207487 is a prime.

It is a congruent number.

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, 6295 + ... + 28984.

It is an arithmetic number, because the mean of its divisors is an integer number (60064200).

Almost surely, 2^400240255 is an apocalyptic number.

400240255 is a deficient number, since it is larger than the sum of its proper divisors (80273345).

400240255 is a wasteful number, since it uses less digits than its factorization.

400240255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37553.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 400240255 is about 20006.0054733572. The cubic root of 400240255 is about 736.9537880343.

Adding to 400240255 its reverse (552042004), we get a palindrome (952282259).

The spelling of 400240255 in words is "four hundred million, two hundred forty thousand, two hundred fifty-five".