421456860 has 288 divisors, whose sum is σ = 1556755200. Its totient is φ = 90961920.

The previous prime is 421456837. The next prime is 421456907. The reversal of 421456860 is 68654124.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 639211 + ... + 639869.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^421456860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421456860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778377600).

421456860 is an abundant number, since it is smaller than the sum of its proper divisors (1135298340).

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

421456860 is a wasteful number, since it uses less digits than its factorization.

421456860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 421456860 is about 20529.4145069946. The cubic root of 421456860 is about 749.7521314239.

The spelling of 421456860 in words is "four hundred twenty-one million, four hundred fifty-six thousand, eight hundred sixty".