220421376 has 216 divisors, whose sum is σ = 739764480. Its totient is φ = 61820928.

The previous prime is 220421359. The next prime is 220421381. The reversal of 220421376 is 673124022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1274026 + ... + 1274198.

Almost surely, 2^220421376 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 220421376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369882240).

220421376 is an abundant number, since it is smaller than the sum of its proper divisors (519343104).

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

220421376 is a wasteful number, since it uses less digits than its factorization.

220421376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 220421376 is about 14846.5947610892. The cubic root of 220421376 is about 604.0662471377.

Adding to 220421376 its reverse (673124022), we get a palindrome (893545398).

The spelling of 220421376 in words is "two hundred twenty million, four hundred twenty-one thousand, three hundred seventy-six".