212404992 has 72 divisors (see below), whose sum is σ = 568632624. Its totient is φ = 70385664.

The previous prime is 212404981. The next prime is 212405003. The reversal of 212404992 is 299404212.

It is an interprime number because it is at equal distance from previous prime (212404981) and next prime (212405003).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147508 + ... + 148940.

Almost surely, 2^212404992 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 212404992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284316312).

212404992 is an abundant number, since it is smaller than the sum of its proper divisors (356227632).

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

212404992 is a wasteful number, since it uses less digits than its factorization.

212404992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 212404992 is about 14574.1206252727. The cubic root of 212404992 is about 596.6526490193.

The spelling of 212404992 in words is "two hundred twelve million, four hundred four thousand, nine hundred ninety-two".