212039986 has 8 divisors (see below), whose sum is σ = 318144924. Its totient is φ = 105991680.

The previous prime is 212039977. The next prime is 212040001. The reversal of 212039986 is 689930212.

It is a happy number.

212039986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 196868961 + 15171025 = 14031^2 + 3895^2 .

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

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, 3055 + ... + 20818.

Almost surely, 2^212039986 is an apocalyptic number.

212039986 is a deficient number, since it is larger than the sum of its proper divisors (106104938).

212039986 is a wasteful number, since it uses less digits than its factorization.

212039986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28316.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 212039986 is about 14561.5928386973. The cubic root of 212039986 is about 596.3106817510.

The spelling of 212039986 in words is "two hundred twelve million, thirty-nine thousand, nine hundred eighty-six".