421854720 has 480 divisors, whose sum is σ = 1679356800. Its totient is φ = 89800704.

The previous prime is 421854703. The next prime is 421854787. The reversal of 421854720 is 27458124.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×421854720² = 355922809572556800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7150051 + ... + 7150109.

It is an arithmetic number, because the mean of its divisors is an integer number (3498660).

Almost surely, 2^421854720 is an apocalyptic number.

421854720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421854720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (839678400).

421854720 is an abundant number, since it is smaller than the sum of its proper divisors (1257502080).

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

421854720 is a wasteful number, since it uses less digits than its factorization.

421854720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 421854720 is about 20539.1022199121. The cubic root of 421854720 is about 749.9879820296.

The spelling of 421854720 in words is "four hundred twenty-one million, eight hundred fifty-four thousand, seven hundred twenty".