28941691663806 has 64 divisors (see below), whose sum is σ = 62228039270400. Its totient is φ = 8944768404576.

The previous prime is 28941691663721. The next prime is 28941691663813. The reversal of 28941691663806 is 60836619614982.

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, 285418191 + ... + 285519573.

It is an arithmetic number, because the mean of its divisors is an integer number (972313113600).

Almost surely, 2^{28941691663806} is an apocalyptic number.

28941691663806 is an abundant number, since it is smaller than the sum of its proper divisors (33286347606594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28941691663806 is a wasteful number, since it uses less digits than its factorization.

28941691663806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154733.

The product of its (nonzero) digits is 161243136, while the sum is 69.

The spelling of 28941691663806 in words is "twenty-eight trillion, nine hundred forty-one billion, six hundred ninety-one million, six hundred sixty-three thousand, eight hundred six".