421750784 has 192 divisors, whose sum is σ = 1086059520. Its totient is φ = 159252480.

The previous prime is 421750781. The next prime is 421750789. The reversal of 421750784 is 487057124.

It is a super-2 number, since 2×421750784² = 355747447609229312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421750781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5777372 + ... + 5777444.

It is an arithmetic number, because the mean of its divisors is an integer number (5656560).

Almost surely, 2^421750784 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 421750784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543029760).

421750784 is an abundant number, since it is smaller than the sum of its proper divisors (664308736).

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

421750784 is a wasteful number, since it uses less digits than its factorization.

421750784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 421750784 is about 20536.5718658203. The cubic root of 421750784 is about 749.9263832929.

The spelling of 421750784 in words is "four hundred twenty-one million, seven hundred fifty thousand, seven hundred eighty-four".