28028005555 has 16 divisors (see below), whose sum is σ = 36741729024. Its totient is φ = 20355936480.

The previous prime is 28028005517. The next prime is 28028005559. The reversal of 28028005555 is 55550082082.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28028005555 is a prime.

It is a super-2 number, since 2×28028005555² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28028005559) 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, 310497 + ... + 390466.

It is an arithmetic number, because the mean of its divisors is an integer number (2296358064).

Almost surely, 2^28028005555 is an apocalyptic number.

28028005555 is a deficient number, since it is larger than the sum of its proper divisors (8713723469).

28028005555 is a wasteful number, since it uses less digits than its factorization.

28028005555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701706.

The product of its (nonzero) digits is 160000, while the sum is 40.

The spelling of 28028005555 in words is "twenty-eight billion, twenty-eight million, five thousand, five hundred fifty-five".