212990 has 24 divisors (see below), whose sum is σ = 411480. Its totient is φ = 79344.

The previous prime is 212987. The next prime is 212999. The reversal of 212990 is 99212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3581 + ... + 3639.

It is an arithmetic number, because the mean of its divisors is an integer number (17145).

2²¹²⁹⁹⁰ is an apocalyptic number.

212990 is a deficient number, since it is larger than the sum of its proper divisors (198490).

212990 is a wasteful number, since it uses less digits than its factorization.

212990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 212990 is about 461.5083964567. The cubic root of 212990 is about 59.7199915839.

The spelling of 212990 in words is "two hundred twelve thousand, nine hundred ninety".