420678 has 12 divisors (see below), whose sum is σ = 911508. Its totient is φ = 140220.

The previous prime is 420677. The next prime is 420683. The reversal of 420678 is 876024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11668 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (75959).

2⁴²⁰⁶⁷⁸ is an apocalyptic number.

420678 is an abundant number, since it is smaller than the sum of its proper divisors (490830).

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

420678 is a wasteful number, since it uses less digits than its factorization.

420678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23379 (or 23376 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 420678 is about 648.5969472639. The cubic root of 420678 is about 74.9289994735.

The spelling of 420678 in words is "four hundred twenty thousand, six hundred seventy-eight".