212287380 has 96 divisors (see below), whose sum is σ = 645980160. Its totient is φ = 51891840.

The previous prime is 212287379. The next prime is 212287403. The reversal of 212287380 is 83782212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32337 + ... + 38343.

It is an arithmetic number, because the mean of its divisors is an integer number (6728960).

Almost surely, 2^212287380 is an apocalyptic number.

212287380 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 212287380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322990080).

212287380 is an abundant number, since it is smaller than the sum of its proper divisors (433692780).

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

212287380 is a wasteful number, since it uses less digits than its factorization.

212287380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6069 (or 6067 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 212287380 is about 14570.0851061344. The cubic root of 212287380 is about 596.5425033541.

The spelling of 212287380 in words is "two hundred twelve million, two hundred eighty-seven thousand, three hundred eighty".