423967745340 has 144 divisors (see below), whose sum is σ = 1353976041600. Its totient is φ = 107087508864.

The previous prime is 423967745293. The next prime is 423967745347. The reversal of 423967745340 is 43547769324.

It is a happy number.

423967745340 is a `hidden beast` number, since 4 + 2 + 39 + 6 + 7 + 74 + 534 + 0 = 666.

It is a super-3 number, since 3×423967745340³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423967745347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28101439 + ... + 28116521.

It is an arithmetic number, because the mean of its divisors is an integer number (9402611400).

Almost surely, 2^423967745340 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 423967745340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676988020800).

423967745340 is an abundant number, since it is smaller than the sum of its proper divisors (930008296260).

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

423967745340 is a wasteful number, since it uses less digits than its factorization.

423967745340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23336 (or 23331 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 54.

The spelling of 423967745340 in words is "four hundred twenty-three billion, nine hundred sixty-seven million, seven hundred forty-five thousand, three hundred forty".