420708870 has 128 divisors (see below), whose sum is σ = 1202964480. Its totient is φ = 104353920.

The previous prime is 420708857. The next prime is 420708917. The reversal of 420708870 is 78807024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228855 + ... + 230685.

It is an arithmetic number, because the mean of its divisors is an integer number (9398160).

Almost surely, 2^420708870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420708870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601482240).

420708870 is an abundant number, since it is smaller than the sum of its proper divisors (782255610).

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

420708870 is a wasteful number, since it uses less digits than its factorization.

420708870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 420708870 is about 20511.1888977699. The cubic root of 420708870 is about 749.3083223054.

The spelling of 420708870 in words is "four hundred twenty million, seven hundred eight thousand, eight hundred seventy".