82189412 has 6 divisors (see below), whose sum is σ = 143831478. Its totient is φ = 41094704.

The previous prime is 82189411. The next prime is 82189423. The reversal of 82189412 is 21498128.

It can be written as a sum of positive squares in only one way, i.e., 67010596 + 15178816 = 8186^2 + 3896^2 .

It is not an unprimeable number, because it can be changed into a prime (82189411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273673 + ... + 10273680.

It is an arithmetic number, because the mean of its divisors is an integer number (23971913).

Almost surely, 2^82189412 is an apocalyptic number.

It is an amenable number.

82189412 is a deficient number, since it is larger than the sum of its proper divisors (61642066).

82189412 is a wasteful number, since it uses less digits than its factorization.

82189412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20547357 (or 20547355 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 82189412 is about 9065.8376336663. The cubic root of 82189412 is about 434.7824022903.

The spelling of 82189412 in words is "eighty-two million, one hundred eighty-nine thousand, four hundred twelve".