421885878 has 16 divisors (see below), whose sum is σ = 844319280. Its totient is φ = 140537376.

The previous prime is 421885853. The next prime is 421885879. The reversal of 421885878 is 878588124.

It is a self number, because there is not a number n which added to its sum of digits gives 421885878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421885879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12433 + ... + 31596.

It is an arithmetic number, because the mean of its divisors is an integer number (52769955).

Almost surely, 2^421885878 is an apocalyptic number.

421885878 is an abundant number, since it is smaller than the sum of its proper divisors (422433402).

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

421885878 is a wasteful number, since it uses less digits than its factorization.

421885878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45631.

The product of its digits is 1146880, while the sum is 51.

The square root of 421885878 is about 20539.8607103359. The cubic root of 421885878 is about 750.0064461668.

The spelling of 421885878 in words is "four hundred twenty-one million, eight hundred eighty-five thousand, eight hundred seventy-eight".