421485870 has 64 divisors (see below), whose sum is σ = 1118859840. Its totient is φ = 100942848.

The previous prime is 421485851. The next prime is 421485881. The reversal of 421485870 is 78584124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175 + ... + 29034.

It is an arithmetic number, because the mean of its divisors is an integer number (17482185).

Almost surely, 2^421485870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421485870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559429920).

421485870 is an abundant number, since it is smaller than the sum of its proper divisors (697373970).

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

421485870 is a wasteful number, since it uses less digits than its factorization.

421485870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29269.

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 421485870 is about 20530.1210420202. The cubic root of 421485870 is about 749.7693335090.

The spelling of 421485870 in words is "four hundred twenty-one million, four hundred eighty-five thousand, eight hundred seventy".