212898386 has 4 divisors (see below), whose sum is σ = 319347582. Its totient is φ = 106449192.

The previous prime is 212898379. The next prime is 212898409. The reversal of 212898386 is 683898212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199685161 + 13213225 = 14131^2 + 3635^2 .

It is a super-2 number, since 2×212898386² = 90651445522809992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212898386.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53224595 + ... + 53224598.

Almost surely, 2^212898386 is an apocalyptic number.

212898386 is a deficient number, since it is larger than the sum of its proper divisors (106449196).

212898386 is a wasteful number, since it uses less digits than its factorization.

212898386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106449195.

The product of its digits is 331776, while the sum is 47.

The square root of 212898386 is about 14591.0378657586. The cubic root of 212898386 is about 597.1142784543.

The spelling of 212898386 in words is "two hundred twelve million, eight hundred ninety-eight thousand, three hundred eighty-six".