212038638 has 32 divisors (see below), whose sum is σ = 497762304. Its totient is φ = 58944672.

The previous prime is 212038627. The next prime is 212038663. The reversal of 212038638 is 836830212.

It is a junction number, because it is equal to n+sod(n) for n = 212038599 and 212038608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66670 + ... + 69777.

It is an arithmetic number, because the mean of its divisors is an integer number (15555072).

Almost surely, 2^212038638 is an apocalyptic number.

212038638 is an abundant number, since it is smaller than the sum of its proper divisors (285723666).

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

212038638 is a wasteful number, since it uses less digits than its factorization.

212038638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136496.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 212038638 is about 14561.5465524786. The cubic root of 212038638 is about 596.3094181081.

The spelling of 212038638 in words is "two hundred twelve million, thirty-eight thousand, six hundred thirty-eight".