402444241 has 8 divisors (see below), whose sum is σ = 407068200. Its totient is φ = 397837440.

The previous prime is 402444239. The next prime is 402444253. The reversal of 402444241 is 142444204.

It can be written as a sum of positive squares in 4 ways, for example, as 84713616 + 317730625 = 9204^2 + 17825^2 .

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 402444241 - 2¹ = 402444239 is a prime.

It is a super-2 number, since 2×402444241² = 323922734228132162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402444941) 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, 46245 + ... + 54253.

It is an arithmetic number, because the mean of its divisors is an integer number (50883525).

Almost surely, 2^402444241 is an apocalyptic number.

It is an amenable number.

402444241 is a deficient number, since it is larger than the sum of its proper divisors (4623959).

402444241 is a wasteful number, since it uses less digits than its factorization.

402444241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8579.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 402444241 is about 20061.0129604664. The cubic root of 402444241 is about 738.3040299856.

Adding to 402444241 its reverse (142444204), we get a palindrome (544888445).

The spelling of 402444241 in words is "four hundred two million, four hundred forty-four thousand, two hundred forty-one".