420091648 has 36 divisors (see below), whose sum is σ = 842352840. Its totient is φ = 209091584.

The previous prime is 420091631. The next prime is 420091657. The reversal of 420091648 is 846190024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54498 + ... + 61726.

It is an arithmetic number, because the mean of its divisors is an integer number (23398690).

Almost surely, 2^420091648 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 420091648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421176420).

420091648 is an abundant number, since it is smaller than the sum of its proper divisors (422261192).

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

420091648 is an equidigital number, since it uses as much as digits as its factorization.

420091648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7472 (or 7458 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 420091648 is about 20496.1373922015. The cubic root of 420091648 is about 748.9417062029.

The spelling of 420091648 in words is "four hundred twenty million, ninety-one thousand, six hundred forty-eight".