400402241 has 4 divisors (see below), whose sum is σ = 423955332. Its totient is φ = 376849152.

The previous prime is 400402213. The next prime is 400402273. The reversal of 400402241 is 142204004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190992400 + 209409841 = 13820^2 + 14471^2 .

It is a cyclic number.

It is not a de Polignac number, because 400402241 - 2¹⁰ = 400401217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 23553073 = 400402241 / (4 + 0 + 0 + 4 + 0 + 2 + 2 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400402201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11776520 + ... + 11776553.

It is an arithmetic number, because the mean of its divisors is an integer number (105988833).

Almost surely, 2^400402241 is an apocalyptic number.

It is an amenable number.

400402241 is a deficient number, since it is larger than the sum of its proper divisors (23553091).

400402241 is a wasteful number, since it uses less digits than its factorization.

400402241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23553090.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 400402241 is about 20010.0534981794. The cubic root of 400402241 is about 737.0531950727.

Adding to 400402241 its reverse (142204004), we get a palindrome (542606245).

The spelling of 400402241 in words is "four hundred million, four hundred two thousand, two hundred forty-one".