28028100420885 has 32 divisors (see below), whose sum is σ = 45269026388352. Its totient is φ = 14807432284160.

The previous prime is 28028100420877. The next prime is 28028100420923. The reversal of 28028100420885 is 58802400182082.

It is a happy number.

It is not a de Polignac number, because 28028100420885 - 2³ = 28028100420877 is a prime.

It is a congruent number.

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, 13643076 + ... + 15562445.

It is an arithmetic number, because the mean of its divisors is an integer number (1414657074636).

Almost surely, 2^{28028100420885} is an apocalyptic number.

It is an amenable number.

28028100420885 is a deficient number, since it is larger than the sum of its proper divisors (17240925967467).

28028100420885 is a wasteful number, since it uses less digits than its factorization.

28028100420885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29206133.

The product of its (nonzero) digits is 655360, while the sum is 48.

The spelling of 28028100420885 in words is "twenty-eight trillion, twenty-eight billion, one hundred million, four hundred twenty thousand, eight hundred eighty-five".