421949858 has 16 divisors (see below), whose sum is σ = 720484416. Its totient is φ = 183456240.

The previous prime is 421949851. The next prime is 421949861. The reversal of 421949858 is 858949124.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421949851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416441 + ... + 417452.

It is an arithmetic number, because the mean of its divisors is an integer number (45030276).

Almost surely, 2^421949858 is an apocalyptic number.

421949858 is a deficient number, since it is larger than the sum of its proper divisors (298534558).

421949858 is a wasteful number, since it uses less digits than its factorization.

421949858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833929.

The product of its digits is 829440, while the sum is 50.

The square root of 421949858 is about 20541.4181107342. The cubic root of 421949858 is about 750.0443576728.

The spelling of 421949858 in words is "four hundred twenty-one million, nine hundred forty-nine thousand, eight hundred fifty-eight".