212278374 has 128 divisors (see below), whose sum is σ = 619315200. Its totient is φ = 52215840.

The previous prime is 212278373. The next prime is 212278387. The reversal of 212278374 is 473872212.

212278374 is a `hidden beast` number, since 2 + 12 + 278 + 374 = 666.

212278374 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212278373) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77659 + ... + 80345.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^212278374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212278374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309657600).

212278374 is an abundant number, since it is smaller than the sum of its proper divisors (407036826).

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

212278374 is a wasteful number, since it uses less digits than its factorization.

212278374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2729 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 212278374 is about 14569.7760449500. The cubic root of 212278374 is about 596.5340674031.

The spelling of 212278374 in words is "two hundred twelve million, two hundred seventy-eight thousand, three hundred seventy-four".