423420342444 has 144 divisors (see below), whose sum is σ = 1233309901824. Its totient is φ = 121282358400.

The previous prime is 423420342419. The next prime is 423420342467. The reversal of 423420342444 is 444243024324.

423420342444 is a `hidden beast` number, since 4 + 2 + 3 + 4 + 203 + 4 + 2 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 423420342399 and 423420342408.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126802 + ... + 928934.

It is an arithmetic number, because the mean of its divisors is an integer number (8564652096).

Almost surely, 2^423420342444 is an apocalyptic number.

423420342444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423420342444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616654950912).

423420342444 is an abundant number, since it is smaller than the sum of its proper divisors (809889559380).

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

423420342444 is a wasteful number, since it uses less digits than its factorization.

423420342444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802228 (or 802223 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 36.

Adding to 423420342444 its reverse (444243024324), we get a palindrome (867663366768).

The spelling of 423420342444 in words is "four hundred twenty-three billion, four hundred twenty million, three hundred forty-two thousand, four hundred forty-four".