402423442 has 8 divisors (see below), whose sum is σ = 604615356. Its totient is φ = 200884992.

The previous prime is 402423421. The next prime is 402423451. The reversal of 402423442 is 244324204.

It can be written as a sum of positive squares in 2 ways, for example, as 401962401 + 461041 = 20049^2 + 679^2 .

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

It is a super-2 number, since 2×402423442² = 323889253342254728, 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 3 ways as a sum of consecutive naturals, for example, 161823 + ... + 164290.

Almost surely, 2^402423442 is an apocalyptic number.

402423442 is a deficient number, since it is larger than the sum of its proper divisors (202191914).

402423442 is a wasteful number, since it uses less digits than its factorization.

402423442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326732.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 402423442 is about 20060.4945602046. The cubic root of 402423442 is about 738.2913108323.

Adding to 402423442 its reverse (244324204), we get a palindrome (646747646).

The spelling of 402423442 in words is "four hundred two million, four hundred twenty-three thousand, four hundred forty-two".