212406630 has 64 divisors (see below), whose sum is σ = 523929600. Its totient is φ = 55085184.

The previous prime is 212406617. The next prime is 212406631. The reversal of 212406630 is 36604212.

It is a self number, because there is not a number n which added to its sum of digits gives 212406630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212406631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280212 + ... + 280968.

It is an arithmetic number, because the mean of its divisors is an integer number (8186400).

Almost surely, 2^212406630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212406630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261964800).

212406630 is an abundant number, since it is smaller than the sum of its proper divisors (311522970).

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

212406630 is a wasteful number, since it uses less digits than its factorization.

212406630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 212406630 is about 14574.1768206647. The cubic root of 212406630 is about 596.6541827474.

The spelling of 212406630 in words is "two hundred twelve million, four hundred six thousand, six hundred thirty".