402442406 has 4 divisors (see below), whose sum is σ = 603663612. Its totient is φ = 201221202.

The previous prime is 402442393. The next prime is 402442421. The reversal of 402442406 is 604244204.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610600 + ... + 100610603.

It is an arithmetic number, because the mean of its divisors is an integer number (150915903).

Almost surely, 2^402442406 is an apocalyptic number.

402442406 is a deficient number, since it is larger than the sum of its proper divisors (201221206).

402442406 is a wasteful number, since it uses less digits than its factorization.

402442406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201221205.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 402442406 is about 20060.9672249371. The cubic root of 402442406 is about 738.3029078509.

The spelling of 402442406 in words is "four hundred two million, four hundred forty-two thousand, four hundred six".