212428238 has 8 divisors (see below), whose sum is σ = 347609880. Its totient is φ = 96558280.

The previous prime is 212428231. The next prime is 212428241. The reversal of 212428238 is 832824212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212428231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4827893 + ... + 4827936.

It is an arithmetic number, because the mean of its divisors is an integer number (43451235).

Almost surely, 2^212428238 is an apocalyptic number.

212428238 is a deficient number, since it is larger than the sum of its proper divisors (135181642).

212428238 is a wasteful number, since it uses less digits than its factorization.

212428238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655842.

The product of its digits is 12288, while the sum is 32.

The square root of 212428238 is about 14574.9181129775. The cubic root of 212428238 is about 596.6744144863.

The spelling of 212428238 in words is "two hundred twelve million, four hundred twenty-eight thousand, two hundred thirty-eight".