287189634468 has 48 divisors (see below), whose sum is σ = 733667344704. Its totient is φ = 86712973440.

The previous prime is 287189634449. The next prime is 287189634469. The reversal of 287189634468 is 864436981782.

It is a happy number.

It is a super-2 number, since 2×287189634468² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 287189634399 and 287189634408.

It is not an unprimeable number, because it can be changed into a prime (287189634469) 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 15 ways as a sum of consecutive naturals, for example, 3890655 + ... + 3963782.

It is an arithmetic number, because the mean of its divisors is an integer number (15284736348).

Almost surely, 2^287189634468 is an apocalyptic number.

It is an amenable number.

287189634468 is an abundant number, since it is smaller than the sum of its proper divisors (446477710236).

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

287189634468 is a wasteful number, since it uses less digits than its factorization.

287189634468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7854732 (or 7854730 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 66.

The spelling of 287189634468 in words is "two hundred eighty-seven billion, one hundred eighty-nine million, six hundred thirty-four thousand, four hundred sixty-eight".