212438 has 4 divisors (see below), whose sum is σ = 318660. Its totient is φ = 106218.

The previous prime is 212437. The next prime is 212447. The reversal of 212438 is 834212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 212438.

It is not an unprimeable number, because it can be changed into a prime (212437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53108 + ... + 53111.

It is an arithmetic number, because the mean of its divisors is an integer number (79665).

2²¹²⁴³⁸ is an apocalyptic number.

212438 is a deficient number, since it is larger than the sum of its proper divisors (106222).

212438 is a wasteful number, since it uses less digits than its factorization.

212438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106221.

The product of its digits is 384, while the sum is 20.

The square root of 212438 is about 460.9099695168. The cubic root of 212438 is about 59.6683554273.

The spelling of 212438 in words is "two hundred twelve thousand, four hundred thirty-eight".