212768138 has 16 divisors (see below), whose sum is σ = 350307936. Its totient is φ = 96117840.

The previous prime is 212768123. The next prime is 212768161. The reversal of 212768138 is 831867212.

212768138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 26081 + ... + 33252.

It is an arithmetic number, because the mean of its divisors is an integer number (21894246).

Almost surely, 2^212768138 is an apocalyptic number.

212768138 is a deficient number, since it is larger than the sum of its proper divisors (137539798).

212768138 is a wasteful number, since it uses less digits than its factorization.

212768138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59509.

The product of its digits is 32256, while the sum is 38.

The square root of 212768138 is about 14586.5738951955. The cubic root of 212768138 is about 596.9924851307.

The spelling of 212768138 in words is "two hundred twelve million, seven hundred sixty-eight thousand, one hundred thirty-eight".