423247222640 has 160 divisors (see below), whose sum is σ = 1085793361920. Its totient is φ = 152152908800.

The previous prime is 423247222621. The next prime is 423247222729. The reversal of 423247222640 is 46222742324.

It is a super-2 number, since 2×423247222640² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423247222594 and 423247222603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47923025 + ... + 47931855.

It is an arithmetic number, because the mean of its divisors is an integer number (6786208512).

Almost surely, 2^423247222640 is an apocalyptic number.

423247222640 is a gapful number since it is divisible by the number (40) 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 423247222640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542896680960).

423247222640 is an abundant number, since it is smaller than the sum of its proper divisors (662546139280).

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

423247222640 is a wasteful number, since it uses less digits than its factorization.

423247222640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9471 (or 9465 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 38.

Adding to 423247222640 its reverse (46222742324), we get a palindrome (469469964964).

The spelling of 423247222640 in words is "four hundred twenty-three billion, two hundred forty-seven million, two hundred twenty-two thousand, six hundred forty".