420071886 has 128 divisors (see below), whose sum is σ = 1053696000. Its totient is φ = 123171840.

The previous prime is 420071879. The next prime is 420071891. The reversal of 420071886 is 688170024.

It is a self number, because there is not a number n which added to its sum of digits gives 420071886.

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, 2110815 + ... + 2111013.

It is an arithmetic number, because the mean of its divisors is an integer number (8232000).

Almost surely, 2^420071886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420071886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526848000).

420071886 is an abundant number, since it is smaller than the sum of its proper divisors (633624114).

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

420071886 is a wasteful number, since it uses less digits than its factorization.

420071886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 420071886 is about 20495.6552956962. The cubic root of 420071886 is about 748.9299620845.

The spelling of 420071886 in words is "four hundred twenty million, seventy-one thousand, eight hundred eighty-six".