213390 has 24 divisors (see below), whose sum is σ = 555048. Its totient is φ = 56880.

The previous prime is 213383. The next prime is 213391. The reversal of 213390 is 93312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213391) by changing a digit.

213390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1096 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (23127).

2²¹³³⁹⁰ is an apocalyptic number.

213390 is an abundant number, since it is smaller than the sum of its proper divisors (341658).

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

213390 is a wasteful number, since it uses less digits than its factorization.

213390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384 (or 2381 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 213390 is about 461.9415547448. The cubic root of 213390 is about 59.7573533663.

The spelling of 213390 in words is "two hundred thirteen thousand, three hundred ninety".