128801869 has 24 divisors (see below), whose sum is σ = 156147264. Its totient is φ = 104011200.

The previous prime is 128801867. The next prime is 128801873. The reversal of 128801869 is 968108821.

It is not a de Polignac number, because 128801869 - 2¹ = 128801867 is a prime.

It is a super-2 number, since 2×128801869² = 33179842915786322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128801861) 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, 275574 + ... + 276040.

It is an arithmetic number, because the mean of its divisors is an integer number (6506136).

Almost surely, 2^128801869 is an apocalyptic number.

It is an amenable number.

128801869 is a deficient number, since it is larger than the sum of its proper divisors (27345395).

128801869 is an equidigital number, since it uses as much as digits as its factorization.

128801869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 128801869 is about 11349.0911089831. The cubic root of 128801869 is about 505.0186170962.

The spelling of 128801869 in words is "one hundred twenty-eight million, eight hundred one thousand, eight hundred sixty-nine".