400421351442 has 16 divisors (see below), whose sum is σ = 915248803392. Its totient is φ = 114406100400.

The previous prime is 400421351441. The next prime is 400421351483. The reversal of 400421351442 is 244153124004.

It is not an unprimeable number, because it can be changed into a prime (400421351441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4766920809 + ... + 4766920892.

It is an arithmetic number, because the mean of its divisors is an integer number (57203050212).

Almost surely, 2^400421351442 is an apocalyptic number.

400421351442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400421351442 is an abundant number, since it is smaller than the sum of its proper divisors (514827451950).

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

400421351442 is a wasteful number, since it uses less digits than its factorization.

400421351442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533841713.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 400421351442 its reverse (244153124004), we get a palindrome (644574475446).

The spelling of 400421351442 in words is "four hundred billion, four hundred twenty-one million, three hundred fifty-one thousand, four hundred forty-two".