421914638 has 16 divisors (see below), whose sum is σ = 637146000. Its totient is φ = 209537472.

The previous prime is 421914631. The next prime is 421914679. The reversal of 421914638 is 836419124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421914631) 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, 259793 + ... + 261411.

It is an arithmetic number, because the mean of its divisors is an integer number (39821625).

Almost surely, 2^421914638 is an apocalyptic number.

421914638 is a deficient number, since it is larger than the sum of its proper divisors (215231362).

421914638 is a wasteful number, since it uses less digits than its factorization.

421914638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419.

The product of its digits is 41472, while the sum is 38.

The square root of 421914638 is about 20540.5608005234. The cubic root of 421914638 is about 750.0234884496.

The spelling of 421914638 in words is "four hundred twenty-one million, nine hundred fourteen thousand, six hundred thirty-eight".