420393871 has 8 divisors (see below), whose sum is σ = 422179200. Its totient is φ = 418613280.

The previous prime is 420393847. The next prime is 420393881. The reversal of 420393871 is 178393024.

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 420393871 - 2¹¹ = 420391823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420393871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420393811) 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, 392725 + ... + 393793.

It is an arithmetic number, because the mean of its divisors is an integer number (52772400).

Almost surely, 2^420393871 is an apocalyptic number.

420393871 is a deficient number, since it is larger than the sum of its proper divisors (1785329).

420393871 is a wasteful number, since it uses less digits than its factorization.

420393871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 420393871 is about 20503.5087485045. The cubic root of 420393871 is about 749.1212647605.

The spelling of 420393871 in words is "four hundred twenty million, three hundred ninety-three thousand, eight hundred seventy-one".