28003030027505 has 16 divisors (see below), whose sum is σ = 36188668657344. Its totient is φ = 20679082038720.

The previous prime is 28003030027481. The next prime is 28003030027507. The reversal of 28003030027505 is 50572003030082.

It is a de Polignac number, because none of the positive numbers 2^k-28003030027505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28003030027507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20753510 + ... + 22061600.

It is an arithmetic number, because the mean of its divisors is an integer number (2261791791084).

Almost surely, 2^{28003030027505} is an apocalyptic number.

It is an amenable number.

28003030027505 is a deficient number, since it is larger than the sum of its proper divisors (8185638629839).

28003030027505 is a wasteful number, since it uses less digits than its factorization.

28003030027505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637456.

The product of its (nonzero) digits is 50400, while the sum is 35.

Adding to 28003030027505 its reverse (50572003030082), we get a palindrome (78575033057587).

The spelling of 28003030027505 in words is "twenty-eight trillion, three billion, thirty million, twenty-seven thousand, five hundred five".