212638474 has 8 divisors (see below), whose sum is σ = 319144320. Its totient is φ = 106257036.

The previous prime is 212638463. The next prime is 212638493. The reversal of 212638474 is 474836212.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26704 + ... + 33739.

It is an arithmetic number, because the mean of its divisors is an integer number (39893040).

Almost surely, 2^212638474 is an apocalyptic number.

212638474 is a deficient number, since it is larger than the sum of its proper divisors (106505846).

212638474 is a wasteful number, since it uses less digits than its factorization.

212638474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62204.

The product of its digits is 64512, while the sum is 37.

The square root of 212638474 is about 14582.1285826178. The cubic root of 212638474 is about 596.8711885176.

The spelling of 212638474 in words is "two hundred twelve million, six hundred thirty-eight thousand, four hundred seventy-four".