82212428 has 6 divisors (see below), whose sum is σ = 143871756. Its totient is φ = 41106212.

The previous prime is 82212407. The next prime is 82212433. The reversal of 82212428 is 82421228.

It is a self number, because there is not a number n which added to its sum of digits gives 82212428.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276550 + ... + 10276557.

It is an arithmetic number, because the mean of its divisors is an integer number (23978626).

Almost surely, 2^82212428 is an apocalyptic number.

It is an amenable number.

82212428 is a deficient number, since it is larger than the sum of its proper divisors (61659328).

82212428 is a wasteful number, since it uses less digits than its factorization.

82212428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553111 (or 20553109 counting only the distinct ones).

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

The square root of 82212428 is about 9067.1069255855. The cubic root of 82212428 is about 434.8229834210.

The spelling of 82212428 in words is "eighty-two million, two hundred twelve thousand, four hundred twenty-eight".