287438979798 has 12 divisors (see below), whose sum is σ = 622784456268. Its totient is φ = 95812993260.

The previous prime is 287438979797. The next prime is 287438979799. The reversal of 287438979798 is 897979834782.

287438979798 is a `hidden beast` number, since 2 + 8 + 7 + 438 + 9 + 7 + 97 + 98 = 666.

It is an interprime number because it is at equal distance from previous prime (287438979797) and next prime (287438979799).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287438979797) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7984416088 + ... + 7984416123.

It is an arithmetic number, because the mean of its divisors is an integer number (51898704689).

Almost surely, 2^287438979798 is an apocalyptic number.

287438979798 is an abundant number, since it is smaller than the sum of its proper divisors (335345476470).

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

287438979798 is a wasteful number, since it uses less digits than its factorization.

287438979798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15968832219 (or 15968832216 counting only the distinct ones).

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

The spelling of 287438979798 in words is "two hundred eighty-seven billion, four hundred thirty-eight million, nine hundred seventy-nine thousand, seven hundred ninety-eight".