212788 has 6 divisors (see below), whose sum is σ = 372386. Its totient is φ = 106392.

The previous prime is 212777. The next prime is 212791. The reversal of 212788 is 887212.

It can be written as a sum of positive squares in only one way, i.e., 195364 + 17424 = 442^2 + 132^2 .

It is a congruent number.

It is an unprimeable number.

212788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26595 + ... + 26602.

2²¹²⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

212788 is a deficient number, since it is larger than the sum of its proper divisors (159598).

212788 is a wasteful number, since it uses less digits than its factorization.

212788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53201 (or 53199 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 212788 is about 461.2894969539. The cubic root of 212788 is about 59.7011061057.

It can be divided in two parts, 212 and 788, that added together give a cube (1000 = 10³).

The spelling of 212788 in words is "two hundred twelve thousand, seven hundred eighty-eight".