82428212 has 6 divisors (see below), whose sum is σ = 144249378. Its totient is φ = 41214104.

The previous prime is 82428211. The next prime is 82428239. The reversal of 82428212 is 21282428.

It can be written as a sum of positive squares in only one way, i.e., 64416676 + 18011536 = 8026^2 + 4244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82428211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303523 + ... + 10303530.

It is an arithmetic number, because the mean of its divisors is an integer number (24041563).

Almost surely, 2^82428212 is an apocalyptic number.

It is an amenable number.

82428212 is a deficient number, since it is larger than the sum of its proper divisors (61821166).

82428212 is a wasteful number, since it uses less digits than its factorization.

82428212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20607057 (or 20607055 counting only the distinct ones).

The product of its digits is 4096, while the sum is 29.

The square root of 82428212 is about 9078.9984029077. The cubic root of 82428212 is about 435.2030795292.

Adding to 82428212 its sum of digits (29), we get a square (82428241 = 9079²).

The spelling of 82428212 in words is "eighty-two million, four hundred twenty-eight thousand, two hundred twelve".