421686606 has 16 divisors (see below), whose sum is σ = 920043648. Its totient is φ = 127783800.

The previous prime is 421686541. The next prime is 421686607. The reversal of 421686606 is 606686124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421686607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194530 + ... + 3194661.

It is an arithmetic number, because the mean of its divisors is an integer number (57502728).

Almost surely, 2^421686606 is an apocalyptic number.

421686606 is an abundant number, since it is smaller than the sum of its proper divisors (498357042).

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

421686606 is a wasteful number, since it uses less digits than its factorization.

421686606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389207.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 421686606 is about 20535.0092768423. The cubic root of 421686606 is about 749.8883424887. Note that the first 3 decimals are identical.

The spelling of 421686606 in words is "four hundred twenty-one million, six hundred eighty-six thousand, six hundred six".