421433280 has 280 divisors, whose sum is σ = 1526865120. Its totient is φ = 110315520.

The previous prime is 421433279. The next prime is 421433291. The reversal of 421433280 is 82334124.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1840206 + ... + 1840434.

Almost surely, 2^421433280 is an apocalyptic number.

421433280 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 421433280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763432560).

421433280 is an abundant number, since it is smaller than the sum of its proper divisors (1105431840).

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

421433280 is a wasteful number, since it uses less digits than its factorization.

421433280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 421433280 is about 20528.8402010440. The cubic root of 421433280 is about 749.7381485891.

The spelling of 421433280 in words is "four hundred twenty-one million, four hundred thirty-three thousand, two hundred eighty".