128288627 has 4 divisors (see below), whose sum is σ = 135040680. Its totient is φ = 121536576.

The previous prime is 128288623. The next prime is 128288659. The reversal of 128288627 is 726882821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128288627 - 2² = 128288623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128288623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3375998 + ... + 3376035.

It is an arithmetic number, because the mean of its divisors is an integer number (33760170).

Almost surely, 2^128288627 is an apocalyptic number.

128288627 is a deficient number, since it is larger than the sum of its proper divisors (6752053).

128288627 is an equidigital number, since it uses as much as digits as its factorization.

128288627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752052.

The product of its digits is 172032, while the sum is 44.

The square root of 128288627 is about 11326.4569482252. The cubic root of 128288627 is about 504.3469347971.

The spelling of 128288627 in words is "one hundred twenty-eight million, two hundred eighty-eight thousand, six hundred twenty-seven".