402444323 has 4 divisors (see below), whose sum is σ = 402812280. Its totient is φ = 402076368.

The previous prime is 402444319. The next prime is 402444373. The reversal of 402444323 is 323444204.

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

It is a cyclic number.

It is not a de Polignac number, because 402444323 - 2² = 402444319 is a prime.

It is a super-2 number, since 2×402444323² = 323922866229856658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402444292 and 402444301.

It is not an unprimeable number, because it can be changed into a prime (402444373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182333 + ... + 184526.

It is an arithmetic number, because the mean of its divisors is an integer number (100703070).

Almost surely, 2^402444323 is an apocalyptic number.

402444323 is a deficient number, since it is larger than the sum of its proper divisors (367957).

402444323 is a wasteful number, since it uses less digits than its factorization.

402444323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367956.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 402444323 is about 20061.0150042315. The cubic root of 402444323 is about 738.3040801300.

Adding to 402444323 its reverse (323444204), we get a palindrome (725888527).

The spelling of 402444323 in words is "four hundred two million, four hundred forty-four thousand, three hundred twenty-three".