213388 has 12 divisors (see below), whose sum is σ = 426832. Its totient is φ = 91440.

The previous prime is 213383. The next prime is 213391. The reversal of 213388 is 883312.

213388 is an admirable number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3783 + ... + 3838.

2²¹³³⁸⁸ is an apocalyptic number.

213388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

213388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213388 is a wasteful number, since it uses less digits than its factorization.

213388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632 (or 7630 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 213388 is about 461.9393899637. The cubic root of 213388 is about 59.7571666736.

The spelling of 213388 in words is "two hundred thirteen thousand, three hundred eighty-eight".