402444225 has 72 divisors (see below), whose sum is σ = 791943360. Its totient is φ = 194451840.

The previous prime is 402444193. The next prime is 402444239. The reversal of 402444225 is 522444204.

It is not a de Polignac number, because 402444225 - 2⁵ = 402444193 is a prime.

It is a super-2 number, since 2×402444225² = 323922708471701250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 96279 + ... + 100371.

Almost surely, 2^402444225 is an apocalyptic number.

402444225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402444225 is a deficient number, since it is larger than the sum of its proper divisors (389499135).

402444225 is a wasteful number, since it uses less digits than its factorization.

402444225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151 (or 4143 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 402444225 is about 20061.0125616829. The cubic root of 402444225 is about 738.3040202014.

Adding to 402444225 its reverse (522444204), we get a palindrome (924888429).

The spelling of 402444225 in words is "four hundred two million, four hundred forty-four thousand, two hundred twenty-five".