28497790617984 has 128 divisors (see below), whose sum is σ = 88534802928000. Its totient is φ = 8999302279680.

The previous prime is 28497790617983. The next prime is 28497790618009. The reversal of 28497790617984 is 48971609779482.

28497790617984 is a `hidden beast` number, since 28 + 497 + 7 + 9 + 0 + 6 + 17 + 98 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28497790617983) 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, 216931402 + ... + 217062729.

It is an arithmetic number, because the mean of its divisors is an integer number (691678147875).

Almost surely, 2^{28497790617984} is an apocalyptic number.

28497790617984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28497790617984 is an abundant number, since it is smaller than the sum of its proper divisors (60037012310016).

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

28497790617984 is a wasteful number, since it uses less digits than its factorization.

28497790617984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433994173 (or 433994155 counting only the distinct ones).

The product of its (nonzero) digits is 3072577536, while the sum is 81.

The spelling of 28497790617984 in words is "twenty-eight trillion, four hundred ninety-seven billion, seven hundred ninety million, six hundred seventeen thousand, nine hundred eighty-four".