128626385 has 8 divisors (see below), whose sum is σ = 154927080. Its totient is φ = 102517504.

The previous prime is 128626367. The next prime is 128626387. The reversal of 128626385 is 583626821.

It can be written as a sum of positive squares in 4 ways, for example, as 2446096 + 126180289 = 1564^2 + 11233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128626385 - 2⁶ = 128626321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128626387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46472 + ... + 49161.

It is an arithmetic number, because the mean of its divisors is an integer number (19365885).

Almost surely, 2^128626385 is an apocalyptic number.

It is an amenable number.

128626385 is a deficient number, since it is larger than the sum of its proper divisors (26300695).

128626385 is an equidigital number, since it uses as much as digits as its factorization.

128626385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95907.

The product of its digits is 138240, while the sum is 41.

The square root of 128626385 is about 11341.3572820893. The cubic root of 128626385 is about 504.7891614067.

The spelling of 128626385 in words is "one hundred twenty-eight million, six hundred twenty-six thousand, three hundred eighty-five".