212642638 has 8 divisors (see below), whose sum is σ = 343499688. Its totient is φ = 98142744.

The previous prime is 212642621. The next prime is 212642653. The reversal of 212642638 is 836246212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4089256 + ... + 4089307.

It is an arithmetic number, because the mean of its divisors is an integer number (42937461).

Almost surely, 2^212642638 is an apocalyptic number.

212642638 is a deficient number, since it is larger than the sum of its proper divisors (130857050).

212642638 is a wasteful number, since it uses less digits than its factorization.

212642638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8178578.

The product of its digits is 27648, while the sum is 34.

The square root of 212642638 is about 14582.2713594282. The cubic root of 212642638 is about 596.8750845755.

The spelling of 212642638 in words is "two hundred twelve million, six hundred forty-two thousand, six hundred thirty-eight".