212606428 has 12 divisors (see below), whose sum is σ = 391643560. Its totient is φ = 100708272.

The previous prime is 212606423. The next prime is 212606431. The reversal of 212606428 is 824606212.

It is a self number, because there is not a number n which added to its sum of digits gives 212606428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212606423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398651 + ... + 1398802.

Almost surely, 2^212606428 is an apocalyptic number.

It is an amenable number.

212606428 is a deficient number, since it is larger than the sum of its proper divisors (179037132).

212606428 is a wasteful number, since it uses less digits than its factorization.

212606428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797476 (or 2797474 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 212606428 is about 14581.0297304409. The cubic root of 212606428 is about 596.8412028888.

The spelling of 212606428 in words is "two hundred twelve million, six hundred six thousand, four hundred twenty-eight".