421820682 has 8 divisors (see below), whose sum is σ = 843641376. Its totient is φ = 140606892.

The previous prime is 421820657. The next prime is 421820687. The reversal of 421820682 is 286028124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

421820682 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (421820687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35151718 + ... + 35151729.

It is an arithmetic number, because the mean of its divisors is an integer number (105455172).

Almost surely, 2^421820682 is an apocalyptic number.

421820682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

421820682 is a wasteful number, since it uses less digits than its factorization.

421820682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70303452.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 421820682 is about 20538.2735885955. The cubic root of 421820682 is about 749.9678101740.

The spelling of 421820682 in words is "four hundred twenty-one million, eight hundred twenty thousand, six hundred eighty-two".