213328026 has 64 divisors (see below), whose sum is σ = 484041600. Its totient is φ = 69631488.

The previous prime is 213328001. The next prime is 213328033. The reversal of 213328026 is 620823312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 727936 + ... + 728228.

It is an arithmetic number, because the mean of its divisors is an integer number (7563150).

Almost surely, 2^213328026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213328026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242020800).

213328026 is an abundant number, since it is smaller than the sum of its proper divisors (270713574).

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

213328026 is a wasteful number, since it uses less digits than its factorization.

213328026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 213328026 is about 14605.7531815377. The cubic root of 213328026 is about 597.5156777689.

The spelling of 213328026 in words is "two hundred thirteen million, three hundred twenty-eight thousand, twenty-six".