212949856 has 96 divisors (see below), whose sum is σ = 496419840. Its totient is φ = 88037376.

The previous prime is 212949811. The next prime is 212949857. The reversal of 212949856 is 658949212.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212949857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189575 + ... + 1189753.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^212949856 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 212949856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248209920).

212949856 is an abundant number, since it is smaller than the sum of its proper divisors (283469984).

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

212949856 is a wasteful number, since it uses less digits than its factorization.

212949856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 348 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 212949856 is about 14592.8015130749. The cubic root of 212949856 is about 597.1623937330.

The spelling of 212949856 in words is "two hundred twelve million, nine hundred forty-nine thousand, eight hundred fifty-six".