213585904 has 90 divisors (see below), whose sum is σ = 497233800. Its totient is φ = 88615296.

The previous prime is 213585893. The next prime is 213585913. The reversal of 213585904 is 409585312.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1073197 + ... + 1073395.

It is an arithmetic number, because the mean of its divisors is an integer number (5524820).

Almost surely, 2^213585904 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 213585904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248616900).

213585904 is an abundant number, since it is smaller than the sum of its proper divisors (283647896).

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

213585904 is a wasteful number, since it uses less digits than its factorization.

213585904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 213585904 is about 14614.5784749339. The cubic root of 213585904 is about 597.7563464148.

The spelling of 213585904 in words is "two hundred thirteen million, five hundred eighty-five thousand, nine hundred four".