28503352505 has 8 divisors (see below), whose sum is σ = 34350822792. Its totient is φ = 22704815488.

The previous prime is 28503352489. The next prime is 28503352519. The reversal of 28503352505 is 50525330582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7624258489 + 20879094016 = 87317^2 + 144496^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28503352505 - 2⁴ = 28503352489 is a prime.

It is a super-2 number, since 2×28503352505² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12232034 + ... + 12234363.

It is an arithmetic number, because the mean of its divisors is an integer number (4293852849).

Almost surely, 2^28503352505 is an apocalyptic number.

It is an amenable number.

28503352505 is a deficient number, since it is larger than the sum of its proper divisors (5847470287).

28503352505 is a wasteful number, since it uses less digits than its factorization.

28503352505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24466635.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 28503352505 in words is "twenty-eight billion, five hundred three million, three hundred fifty-two thousand, five hundred five".