420878671 has 8 divisors (see below), whose sum is σ = 451390320. Its totient is φ = 391203072.

The previous prime is 420878651. The next prime is 420878687. The reversal of 420878671 is 176878024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420878671 - 2⁷ = 420878543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420878611) 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, 207970 + ... + 209983.

It is an arithmetic number, because the mean of its divisors is an integer number (56423790).

Almost surely, 2^420878671 is an apocalyptic number.

420878671 is a deficient number, since it is larger than the sum of its proper divisors (30511649).

420878671 is a wasteful number, since it uses less digits than its factorization.

420878671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418025.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 420878671 is about 20515.3277088132. The cubic root of 420878671 is about 749.4091174141.

The spelling of 420878671 in words is "four hundred twenty million, eight hundred seventy-eight thousand, six hundred seventy-one".