427645620220 has 96 divisors (see below), whose sum is σ = 1106346197376. Its totient is φ = 135214617600.

The previous prime is 427645620203. The next prime is 427645620229. The reversal of 427645620220 is 22026546724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427645620229) 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, 1820290 + ... + 2041750.

It is an arithmetic number, because the mean of its divisors is an integer number (11524439556).

Almost surely, 2^427645620220 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 427645620220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553173098688).

427645620220 is an abundant number, since it is smaller than the sum of its proper divisors (678700577156).

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

427645620220 is a wasteful number, since it uses less digits than its factorization.

427645620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222551 (or 222549 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 40.

The spelling of 427645620220 in words is "four hundred twenty-seven billion, six hundred forty-five million, six hundred twenty thousand, two hundred twenty".