421941798 has 48 divisors (see below), whose sum is σ = 966013776. Its totient is φ = 137985120.

The previous prime is 421941781. The next prime is 421941803. The reversal of 421941798 is 897149124.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17568 + ... + 33948.

It is an arithmetic number, because the mean of its divisors is an integer number (20125287).

Almost surely, 2^421941798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421941798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483006888).

421941798 is an abundant number, since it is smaller than the sum of its proper divisors (544071978).

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

421941798 is a wasteful number, since it uses less digits than its factorization.

421941798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16451 (or 16439 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 421941798 is about 20541.2219208108. The cubic root of 421941798 is about 750.0395819110.

The spelling of 421941798 in words is "four hundred twenty-one million, nine hundred forty-one thousand, seven hundred ninety-eight".