402421442408 has 16 divisors (see below), whose sum is σ = 762318970980. Its totient is φ = 199136383488.

The previous prime is 402421442393. The next prime is 402421442491. The reversal of 402421442408 is 804244124204.

It can be written as a sum of positive squares in 2 ways, for example, as 391147674724 + 11273767684 = 625418^2 + 106178^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259291391 + ... + 259292942.

Almost surely, 2^402421442408 is an apocalyptic number.

It is an amenable number.

402421442408 is a deficient number, since it is larger than the sum of its proper divisors (359897528572).

402421442408 is a wasteful number, since it uses less digits than its factorization.

402421442408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518584436 (or 518584432 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 35.

The spelling of 402421442408 in words is "four hundred two billion, four hundred twenty-one million, four hundred forty-two thousand, four hundred eight".