213344028 has 18 divisors (see below), whose sum is σ = 539286384. Its totient is φ = 71114664.

The previous prime is 213343997. The next prime is 213344029. The reversal of 213344028 is 820443312.

213344028 is a `hidden beast` number, since 213 + 3 + 440 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 213343992 and 213344010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213344029) 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 5 ways as a sum of consecutive naturals, for example, 2963076 + ... + 2963147.

Almost surely, 2^213344028 is an apocalyptic number.

It is an amenable number.

213344028 is an abundant number, since it is smaller than the sum of its proper divisors (325942356).

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

213344028 is a wasteful number, since it uses less digits than its factorization.

213344028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926233 (or 5926228 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 213344028 is about 14606.3009691023. The cubic root of 213344028 is about 597.5306175262.

The spelling of 213344028 in words is "two hundred thirteen million, three hundred forty-four thousand, twenty-eight".