128287827 has 16 divisors (see below), whose sum is σ = 196188160. Its totient is φ = 82765800.

The previous prime is 128287823. The next prime is 128287837. The reversal of 128287827 is 728782821.

It is not a de Polignac number, because 128287827 - 2² = 128287823 is a prime.

It is a super-3 number, since 3×128287827³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128287823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75799 + ... + 77472.

It is an arithmetic number, because the mean of its divisors is an integer number (12261760).

Almost surely, 2^128287827 is an apocalyptic number.

128287827 is a deficient number, since it is larger than the sum of its proper divisors (67900333).

128287827 is a wasteful number, since it uses less digits than its factorization.

128287827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153311 (or 153305 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 128287827 is about 11326.4216326252. The cubic root of 128287827 is about 504.3458864361.

The spelling of 128287827 in words is "one hundred twenty-eight million, two hundred eighty-seven thousand, eight hundred twenty-seven".