28020569494 has 16 divisors (see below), whose sum is σ = 42230200320. Its totient is φ = 13943868840.

The previous prime is 28020569483. The next prime is 28020569503. The reversal of 28020569494 is 49496502082.

It is a congruent number.

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, 2890147 + ... + 2899825.

It is an arithmetic number, because the mean of its divisors is an integer number (2639387520).

Almost surely, 2^28020569494 is an apocalyptic number.

28020569494 is a deficient number, since it is larger than the sum of its proper divisors (14209630826).

28020569494 is a wasteful number, since it uses less digits than its factorization.

28020569494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16395.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 28020569494 in words is "twenty-eight billion, twenty million, five hundred sixty-nine thousand, four hundred ninety-four".