213459728 has 20 divisors (see below), whose sum is σ = 414253248. Its totient is φ = 106555680.

The previous prime is 213459721. The next prime is 213459731. The reversal of 213459728 is 827954312.

It is not an unprimeable number, because it can be changed into a prime (213459721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 476 + ... + 20667.

Almost surely, 2^213459728 is an apocalyptic number.

It is an amenable number.

213459728 is a deficient number, since it is larger than the sum of its proper divisors (200793520).

213459728 is a wasteful number, since it uses less digits than its factorization.

213459728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21782 (or 21776 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 213459728 is about 14610.2610517403. The cubic root of 213459728 is about 597.6386149225.

The spelling of 213459728 in words is "two hundred thirteen million, four hundred fifty-nine thousand, seven hundred twenty-eight".