423646740 has 192 divisors, whose sum is σ = 1459019520. Its totient is φ = 101191680.

The previous prime is 423646739. The next prime is 423646753. The reversal of 423646740 is 47646324.

423646740 is a `hidden beast` number, since 4 + 2 + 3 + 646 + 7 + 4 + 0 = 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 = 423646695 and 423646704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 433132 + ... + 434108.

It is an arithmetic number, because the mean of its divisors is an integer number (7599060).

Almost surely, 2^423646740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423646740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729509760).

423646740 is an abundant number, since it is smaller than the sum of its proper divisors (1035372780).

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

423646740 is a wasteful number, since it uses less digits than its factorization.

423646740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The square root of 423646740 is about 20582.6805834420. The cubic root of 423646740 is about 751.0484536436.

The spelling of 423646740 in words is "four hundred twenty-three million, six hundred forty-six thousand, seven hundred forty".