128107287 has 24 divisors (see below), whose sum is σ = 230705280. Its totient is φ = 66548880.

The previous prime is 128107279. The next prime is 128107303. The reversal of 128107287 is 782701821.

It is a happy number.

It is not a de Polignac number, because 128107287 - 2³ = 128107279 is a prime.

It is a super-2 number, since 2×128107287² = 32822953965000738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128107207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91737 + ... + 93122.

It is an arithmetic number, because the mean of its divisors is an integer number (9612720).

Almost surely, 2^128107287 is an apocalyptic number.

128107287 is a deficient number, since it is larger than the sum of its proper divisors (102597993).

128107287 is a wasteful number, since it uses less digits than its factorization.

128107287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184883 (or 184880 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 128107287 is about 11318.4489661791. The cubic root of 128107287 is about 504.1091860004.

The spelling of 128107287 in words is "one hundred twenty-eight million, one hundred seven thousand, two hundred eighty-seven".