287157428860 has 24 divisors (see below), whose sum is σ = 609001204896. Its totient is φ = 113725713600.

The previous prime is 287157428851. The next prime is 287157428893. The reversal of 287157428860 is 68824751782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 287157428795 and 287157428804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71076552 + ... + 71080591.

It is an arithmetic number, because the mean of its divisors is an integer number (25375050204).

Almost surely, 2^287157428860 is an apocalyptic number.

287157428860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287157428860 is an abundant number, since it is smaller than the sum of its proper divisors (321843776036).

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

287157428860 is a wasteful number, since it uses less digits than its factorization.

287157428860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142157253 (or 142157251 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 58.

The spelling of 287157428860 in words is "two hundred eighty-seven billion, one hundred fifty-seven million, four hundred twenty-eight thousand, eight hundred sixty".