424440420660 has 96 divisors (see below), whose sum is σ = 1321932326400. Its totient is φ = 113059739520.

The previous prime is 424440420637. The next prime is 424440420661. The reversal of 424440420660 is 66024044424.

424440420660 is a `hidden beast` number, since 4 + 2 + 4 + 440 + 4 + 206 + 6 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424440420661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60546 + ... + 923334.

It is an arithmetic number, because the mean of its divisors is an integer number (13770128400).

Almost surely, 2^424440420660 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 424440420660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660966163200).

424440420660 is an abundant number, since it is smaller than the sum of its proper divisors (897491905740).

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

424440420660 is a wasteful number, since it uses less digits than its factorization.

424440420660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863718 (or 863710 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

The spelling of 424440420660 in words is "four hundred twenty-four billion, four hundred forty million, four hundred twenty thousand, six hundred sixty".