402142442404 has 6 divisors (see below), whose sum is σ = 703749274214. Its totient is φ = 201071221200.

The previous prime is 402142442399. The next prime is 402142442407. The reversal of 402142442404 is 404244241204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 225197702500 + 176944739904 = 474550^2 + 420648^2 .

It is not an unprimeable number, because it can be changed into a prime (402142442407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50267805297 + ... + 50267805304.

Almost surely, 2^402142442404 is an apocalyptic number.

It is an amenable number.

402142442404 is a deficient number, since it is larger than the sum of its proper divisors (301606831810).

402142442404 is a wasteful number, since it uses less digits than its factorization.

402142442404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100535610605 (or 100535610603 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 402142442404 its reverse (404244241204), we get a palindrome (806386683608).

The spelling of 402142442404 in words is "four hundred two billion, one hundred forty-two million, four hundred forty-two thousand, four hundred four".