82789012 has 6 divisors (see below), whose sum is σ = 144880778. Its totient is φ = 41394504.

The previous prime is 82789009. The next prime is 82789013. The reversal of 82789012 is 21098728.

It can be written as a sum of positive squares in only one way, i.e., 48636676 + 34152336 = 6974^2 + 5844^2 .

It is a super-2 number, since 2×82789012² = 13708041015872288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82789013) by changing a digit.

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 as a sum of consecutive naturals, namely, 10348623 + ... + 10348630.

Almost surely, 2^82789012 is an apocalyptic number.

It is an amenable number.

82789012 is a deficient number, since it is larger than the sum of its proper divisors (62091766).

82789012 is a wasteful number, since it uses less digits than its factorization.

82789012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20697257 (or 20697255 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 82789012 is about 9098.8467401094. The cubic root of 82789012 is about 435.8371372194.

The spelling of 82789012 in words is "eighty-two million, seven hundred eighty-nine thousand, twelve".