28420210135505 has 32 divisors (see below), whose sum is σ = 34629594418944. Its totient is φ = 22388691060736.

The previous prime is 28420210135487. The next prime is 28420210135523. The reversal of 28420210135505 is 50553101202482.

It is an interprime number because it is at equal distance from previous prime (28420210135487) and next prime (28420210135523).

It is a cyclic number.

It is not a de Polignac number, because 28420210135505 - 2¹² = 28420210131409 is a prime.

It is a super-2 number, since 2×28420210135505² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188917877 + ... + 189068253.

It is an arithmetic number, because the mean of its divisors is an integer number (1082174825592).

Almost surely, 2^{28420210135505} is an apocalyptic number.

It is an amenable number.

28420210135505 is a deficient number, since it is larger than the sum of its proper divisors (6209384283439).

28420210135505 is a wasteful number, since it uses less digits than its factorization.

28420210135505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152665.

The product of its (nonzero) digits is 96000, while the sum is 38.

Adding to 28420210135505 its reverse (50553101202482), we get a palindrome (78973311337987).

The spelling of 28420210135505 in words is "twenty-eight trillion, four hundred twenty billion, two hundred ten million, one hundred thirty-five thousand, five hundred five".