217482728 has 16 divisors (see below), whose sum is σ = 408310080. Its totient is φ = 108600048.

The previous prime is 217482709. The next prime is 217482731. The reversal of 217482728 is 827284712.

217482728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10976 + ... + 23567.

It is an arithmetic number, because the mean of its divisors is an integer number (25519380).

Almost surely, 2^217482728 is an apocalyptic number.

It is an amenable number.

217482728 is a deficient number, since it is larger than the sum of its proper divisors (190827352).

217482728 is a wasteful number, since it uses less digits than its factorization.

217482728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35336 (or 35332 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 217482728 is about 14747.2956164851. The cubic root of 217482728 is about 601.3697668148.

The spelling of 217482728 in words is "two hundred seventeen million, four hundred eighty-two thousand, seven hundred twenty-eight".