402421442442 has 128 divisors (see below), whose sum is σ = 891824394240. Its totient is φ = 120489431040.

The previous prime is 402421442393. The next prime is 402421442491. The reversal of 402421442442 is 244244124204.

It is an interprime number because it is at equal distance from previous prime (402421442393) and next prime (402421442491).

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 63 ways as a sum of consecutive naturals, for example, 157379028 + ... + 157381584.

It is an arithmetic number, because the mean of its divisors is an integer number (6967378080).

Almost surely, 2^402421442442 is an apocalyptic number.

402421442442 is an abundant number, since it is smaller than the sum of its proper divisors (489402951798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402421442442 is a wasteful number, since it uses less digits than its factorization.

402421442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 65536, while the sum is 33.

Adding to 402421442442 its reverse (244244124204), we get a palindrome (646665566646).

The spelling of 402421442442 in words is "four hundred two billion, four hundred twenty-one million, four hundred forty-two thousand, four hundred forty-two".