212974686 has 48 divisors (see below), whose sum is σ = 491259600. Its totient is φ = 66489984.

The previous prime is 212974679. The next prime is 212974703. The reversal of 212974686 is 686479212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26940 + ... + 33936.

It is an arithmetic number, because the mean of its divisors is an integer number (10234575).

Almost surely, 2^212974686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212974686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245629800).

212974686 is an abundant number, since it is smaller than the sum of its proper divisors (278284914).

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

212974686 is a wasteful number, since it uses less digits than its factorization.

212974686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113 (or 7110 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 212974686 is about 14593.6522502080. The cubic root of 212974686 is about 597.1856025864.

The spelling of 212974686 in words is "two hundred twelve million, nine hundred seventy-four thousand, six hundred eighty-six".