212009988 has 24 divisors (see below), whose sum is σ = 495385408. Its totient is φ = 70570656.

The previous prime is 212009957. The next prime is 212009989. The reversal of 212009988 is 889900212.

It is not an unprimeable number, because it can be changed into a prime (212009989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256 + ... + 20847.

Almost surely, 2^212009988 is an apocalyptic number.

It is an amenable number.

212009988 is an abundant number, since it is smaller than the sum of its proper divisors (283375420).

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

212009988 is a wasteful number, since it uses less digits than its factorization.

212009988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24843 (or 24841 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 212009988 is about 14560.5627638495. The cubic root of 212009988 is about 596.2825597416.

The spelling of 212009988 in words is "two hundred twelve million, nine thousand, nine hundred eighty-eight".