421983678 has 16 divisors (see below), whose sum is σ = 846322560. Its totient is φ = 140268696.

The previous prime is 421983671. The next prime is 421983689. The reversal of 421983678 is 876389124.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421983671) 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, 95800 + ... + 100107.

It is an arithmetic number, because the mean of its divisors is an integer number (52895160).

Almost surely, 2^421983678 is an apocalyptic number.

421983678 is an abundant number, since it is smaller than the sum of its proper divisors (424338882).

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

421983678 is a wasteful number, since it uses less digits than its factorization.

421983678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196271.

The product of its digits is 580608, while the sum is 48.

The square root of 421983678 is about 20542.2413090685. The cubic root of 421983678 is about 750.0643962485.

The spelling of 421983678 in words is "four hundred twenty-one million, nine hundred eighty-three thousand, six hundred seventy-eight".