82890012 has 12 divisors (see below), whose sum is σ = 193410056. Its totient is φ = 27630000.

The previous prime is 82890007. The next prime is 82890023. The reversal of 82890012 is 21009828.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3453739 + ... + 3453762.

Almost surely, 2^82890012 is an apocalyptic number.

It is an amenable number.

82890012 is an abundant number, since it is smaller than the sum of its proper divisors (110520044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82890012 is a wasteful number, since it uses less digits than its factorization.

82890012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6907508 (or 6907506 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 82890012 is about 9104.3952023185. The cubic root of 82890012 is about 436.0143010768.

The spelling of 82890012 in words is "eighty-two million, eight hundred ninety thousand, twelve".