213270928 has 40 divisors (see below), whose sum is σ = 450665600. Its totient is φ = 97179264.

The previous prime is 213270919. The next prime is 213270929. The reversal of 213270928 is 829072312.

It is a junction number, because it is equal to n+sod(n) for n = 213270893 and 213270902.

It is not an unprimeable number, because it can be changed into a prime (213270929) 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 7 ways as a sum of consecutive naturals, for example, 9943 + ... + 22921.

It is an arithmetic number, because the mean of its divisors is an integer number (11266640).

Almost surely, 2^213270928 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 213270928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225332800).

213270928 is an abundant number, since it is smaller than the sum of its proper divisors (237394672).

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

213270928 is a wasteful number, since it uses less digits than its factorization.

213270928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13079 (or 13073 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 213270928 is about 14603.7984100028. The cubic root of 213270928 is about 597.4623639512.

The spelling of 213270928 in words is "two hundred thirteen million, two hundred seventy thousand, nine hundred twenty-eight".