28985420586897 has 16 divisors (see below), whose sum is σ = 42941853146880. Its totient is φ = 19323393533136.

The previous prime is 28985420586781. The next prime is 28985420586937. The reversal of 28985420586897 is 79868502458982.

28985420586897 is a `hidden beast` number, since 2 + 8 + 9 + 8 + 5 + 4 + 20 + 586 + 8 + 9 + 7 = 666.

It is not a de Polignac number, because 28985420586897 - 2²² = 28985416392593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28985420576897) 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, 3685513 + ... + 8458950.

It is an arithmetic number, because the mean of its divisors is an integer number (2683865821680).

Almost surely, 2^{28985420586897} is an apocalyptic number.

28985420586897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28985420586897 is a deficient number, since it is larger than the sum of its proper divisors (13956432559983).

28985420586897 is a wasteful number, since it uses less digits than its factorization.

28985420586897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12232869 (or 12232863 counting only the distinct ones).

The product of its (nonzero) digits is 5573836800, while the sum is 81.

The spelling of 28985420586897 in words is "twenty-eight trillion, nine hundred eighty-five billion, four hundred twenty million, five hundred eighty-six thousand, eight hundred ninety-seven".