28420210135506 has 16 divisors (see below), whose sum is σ = 64960480309824. Its totient is φ = 8120060038704.

The previous prime is 28420210135487. The next prime is 28420210135523. The reversal of 28420210135506 is 60553101202482.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338335834905 + ... + 338335834988.

It is an arithmetic number, because the mean of its divisors is an integer number (4060030019364).

Almost surely, 2^{28420210135506} is an apocalyptic number.

28420210135506 is an abundant number, since it is smaller than the sum of its proper divisors (36540270174318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28420210135506 is a wasteful number, since it uses less digits than its factorization.

28420210135506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676671669905.

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 28420210135506 its reverse (60553101202482), we get a palindrome (88973311337988).

The spelling of 28420210135506 in words is "twenty-eight trillion, four hundred twenty billion, two hundred ten million, one hundred thirty-five thousand, five hundred six".