212878692 has 144 divisors (see below), whose sum is σ = 636959232. Its totient is φ = 61585920.

The previous prime is 212878691. The next prime is 212878697. The reversal of 212878692 is 296878212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212878691) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 214317 + ... + 215307.

It is an arithmetic number, because the mean of its divisors is an integer number (4423328).

Almost surely, 2^212878692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212878692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318479616).

212878692 is an abundant number, since it is smaller than the sum of its proper divisors (424080540).

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

212878692 is a wasteful number, since it uses less digits than its factorization.

212878692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1026 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 212878692 is about 14590.3629838329. The cubic root of 212878692 is about 597.0958660222.

The spelling of 212878692 in words is "two hundred twelve million, eight hundred seventy-eight thousand, six hundred ninety-two".