82428242 has 32 divisors (see below), whose sum is σ = 136391472. Its totient is φ = 37131264.

The previous prime is 82428239. The next prime is 82428253. The reversal of 82428242 is 24282428.

It is a happy number.

It is a Cunningham number, because it is equal to 9079²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 12187081 + 70241161 = 3491^2 + 8381^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82428199 and 82428208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259868 + ... + 260184.

Almost surely, 2^82428242 is an apocalyptic number.

82428242 is a deficient number, since it is larger than the sum of its proper divisors (53963230).

82428242 is a wasteful number, since it uses less digits than its factorization.

82428242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 16384, while the sum is 32.

The square root of 82428242 is about 9079.0000550721. Note that the first 4 decimals coincide. The cubic root of 82428242 is about 435.2031323270.

The spelling of 82428242 in words is "eighty-two million, four hundred twenty-eight thousand, two hundred forty-two".