212890630 has 32 divisors (see below), whose sum is σ = 408924000. Its totient is φ = 79564032.

The previous prime is 212890621. The next prime is 212890631. The reversal of 212890630 is 36098212.

It is a junction number, because it is equal to n+sod(n) for n = 212890592 and 212890601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212890631) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 6196 + ... + 21544.

It is an arithmetic number, because the mean of its divisors is an integer number (12778875).

Almost surely, 2^212890630 is an apocalyptic number.

212890630 is a deficient number, since it is larger than the sum of its proper divisors (196033370).

212890630 is a wasteful number, since it uses less digits than its factorization.

212890630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15448.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 212890630 is about 14590.7720837521. The cubic root of 212890630 is about 597.1070273040.

The spelling of 212890630 in words is "two hundred twelve million, eight hundred ninety thousand, six hundred thirty".