421768620 has 240 divisors, whose sum is σ = 1629004608. Its totient is φ = 88957440.

The previous prime is 421768583. The next prime is 421768667. The reversal of 421768620 is 26867124.

421768620 is a `hidden beast` number, since 4 + 21 + 7 + 6 + 8 + 620 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 145990 + ... + 148850.

Almost surely, 2^421768620 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 421768620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814502304).

421768620 is an abundant number, since it is smaller than the sum of its proper divisors (1207235988).

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

421768620 is a wasteful number, since it uses less digits than its factorization.

421768620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902 (or 2891 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 421768620 is about 20537.0061109208. The cubic root of 421768620 is about 749.9369547005.

The spelling of 421768620 in words is "four hundred twenty-one million, seven hundred sixty-eight thousand, six hundred twenty".