402023422 has 4 divisors (see below), whose sum is σ = 603035136. Its totient is φ = 201011710.

The previous prime is 402023393. The next prime is 402023449. The reversal of 402023422 is 224320204.

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

It is a self number, because there is not a number n which added to its sum of digits gives 402023422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505854 + ... + 100505857.

It is an arithmetic number, because the mean of its divisors is an integer number (150758784).

Almost surely, 2^402023422 is an apocalyptic number.

402023422 is a deficient number, since it is larger than the sum of its proper divisors (201011714).

402023422 is a wasteful number, since it uses less digits than its factorization.

402023422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201011713.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 402023422 is about 20050.5217388476. The cubic root of 402023422 is about 738.0466024238.

Adding to 402023422 its reverse (224320204), we get a palindrome (626343626).

The spelling of 402023422 in words is "four hundred two million, twenty-three thousand, four hundred twenty-two".