421728310 has 16 divisors (see below), whose sum is σ = 762265152. Its totient is φ = 167990400.

The previous prime is 421728301. The next prime is 421728323. The reversal of 421728310 is 13827124.

It is a super-2 number, since 2×421728310² = 355709534910912200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 85086 + ... + 89905.

It is an arithmetic number, because the mean of its divisors is an integer number (47641572).

Almost surely, 2^421728310 is an apocalyptic number.

421728310 is a deficient number, since it is larger than the sum of its proper divisors (340536842).

421728310 is a wasteful number, since it uses less digits than its factorization.

421728310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175239.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 421728310 is about 20536.0246883373. The cubic root of 421728310 is about 749.9130625155.

The spelling of 421728310 in words is "four hundred twenty-one million, seven hundred twenty-eight thousand, three hundred ten".