213628734 has 48 divisors (see below), whose sum is σ = 513527040. Its totient is φ = 63635280.

The previous prime is 213628729. The next prime is 213628741. The reversal of 213628734 is 437826312.

It is a happy number.

213628734 is a `hidden beast` number, since 21 + 3 + 628 + 7 + 3 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2539 + ... + 20825.

It is an arithmetic number, because the mean of its divisors is an integer number (10698480).

Almost surely, 2^213628734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213628734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256763520).

213628734 is an abundant number, since it is smaller than the sum of its proper divisors (299898306).

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

213628734 is a wasteful number, since it uses less digits than its factorization.

213628734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18365 (or 18362 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 213628734 is about 14616.0437191464. The cubic root of 213628734 is about 597.7962994153.

The spelling of 213628734 in words is "two hundred thirteen million, six hundred twenty-eight thousand, seven hundred thirty-four".