212798890 has 8 divisors (see below), whose sum is σ = 383038020. Its totient is φ = 85119552.

The previous prime is 212798837. The next prime is 212798893. The reversal of 212798890 is 98897212.

It can be written as a sum of positive squares in 2 ways, for example, as 197093521 + 15705369 = 14039^2 + 3963^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 212798890.

It is not an unprimeable number, because it can be changed into a prime (212798893) 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, 10639935 + ... + 10639954.

Almost surely, 2^212798890 is an apocalyptic number.

212798890 is a deficient number, since it is larger than the sum of its proper divisors (170239130).

212798890 is a wasteful number, since it uses less digits than its factorization.

212798890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21279896.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 212798890 is about 14587.6279771593. The cubic root of 212798890 is about 597.0212454339.

The spelling of 212798890 in words is "two hundred twelve million, seven hundred ninety-eight thousand, eight hundred ninety".