402000000442 has 8 divisors (see below), whose sum is σ = 603105125076. Its totient is φ = 200964958752.

The previous prime is 402000000439. The next prime is 402000000517. The reversal of 402000000442 is 244000000204.

It can be written as a sum of positive squares in 2 ways, for example, as 390738758281 + 11261242161 = 625091^2 + 106119^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17506393 + ... + 17529340.

Almost surely, 2^402000000442 is an apocalyptic number.

402000000442 is a deficient number, since it is larger than the sum of its proper divisors (201105124634).

402000000442 is a wasteful number, since it uses less digits than its factorization.

402000000442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35041472.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 402000000442 its reverse (244000000204), we get a palindrome (646000000646).

The spelling of 402000000442 in words is "four hundred two billion, four hundred forty-two", and thus it is an aban number.