423605325640 has 128 divisors (see below), whose sum is σ = 1112628337920. Its totient is φ = 142152192000.

The previous prime is 423605325631. The next prime is 423605325659. The reversal of 423605325640 is 46523506324.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 423605325593 and 423605325602.

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, 2598540 + ... + 2756740.

It is an arithmetic number, because the mean of its divisors is an integer number (8692408890).

Almost surely, 2^423605325640 is an apocalyptic number.

423605325640 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 423605325640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556314168960).

423605325640 is an abundant number, since it is smaller than the sum of its proper divisors (689023012280).

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

423605325640 is a wasteful number, since it uses less digits than its factorization.

423605325640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158423 (or 158419 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 423605325640 in words is "four hundred twenty-three billion, six hundred five million, three hundred twenty-five thousand, six hundred forty".