212609880 has 128 divisors (see below), whose sum is σ = 809971200. Its totient is φ = 48594816.

The previous prime is 212609833. The next prime is 212609899. The reversal of 212609880 is 88906212.

It is a super-2 number, since 2×212609880² = 90405922147228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6502 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (6327900).

Almost surely, 2^212609880 is an apocalyptic number.

212609880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212609880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404985600).

212609880 is an abundant number, since it is smaller than the sum of its proper divisors (597361320).

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

212609880 is a wasteful number, since it uses less digits than its factorization.

212609880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28150 (or 28140 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 212609880 is about 14581.1481029444. The cubic root of 212609880 is about 596.8444330901.

The spelling of 212609880 in words is "two hundred twelve million, six hundred nine thousand, eight hundred eighty".