420064444800 has 1920 divisors, whose sum is σ = 2082579206400. Its totient is φ = 80522035200.

The previous prime is 420064444747. The next prime is 420064444823. The reversal of 420064444800 is 8444460024.

420064444800 is a `hidden beast` number, since 4 + 2 + 0 + 0 + 644 + 4 + 4 + 8 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 259458391 + ... + 259460009.

It is an arithmetic number, because the mean of its divisors is an integer number (1084676670).

Almost surely, 2^420064444800 is an apocalyptic number.

420064444800 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 420064444800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041289603200).

420064444800 is an abundant number, since it is smaller than the sum of its proper divisors (1662514761600).

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

420064444800 is a wasteful number, since it uses less digits than its factorization.

420064444800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 36.

The spelling of 420064444800 in words is "four hundred twenty billion, sixty-four million, four hundred forty-four thousand, eight hundred".