213728738 has 8 divisors (see below), whose sum is σ = 321002832. Its totient is φ = 106727796.

The previous prime is 213728737. The next prime is 213728747. The reversal of 213728738 is 837827312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 213728695 and 213728704.

It is not an unprimeable number, because it can be changed into a prime (213728731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66320 + ... + 69467.

It is an arithmetic number, because the mean of its divisors is an integer number (40125354).

Almost surely, 2^213728738 is an apocalyptic number.

213728738 is a deficient number, since it is larger than the sum of its proper divisors (107274094).

213728738 is a wasteful number, since it uses less digits than its factorization.

213728738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136576.

The product of its digits is 112896, while the sum is 41.

The square root of 213728738 is about 14619.4643540726. The cubic root of 213728738 is about 597.8895651074.

The spelling of 213728738 in words is "two hundred thirteen million, seven hundred twenty-eight thousand, seven hundred thirty-eight".