128626 has 8 divisors (see below), whose sum is σ = 195804. Its totient is φ = 63360.

The previous prime is 128621. The next prime is 128629. The reversal of 128626 is 626821.

128626 = T₁₉ + T₂₀ + ... + T₉₁.

It can be written as a sum of positive squares in 2 ways, for example, as 126025 + 2601 = 355^2 + 51^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 128626.

It is not an unprimeable number, because it can be changed into a prime (128621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295 + ... + 586.

2¹²⁸⁶²⁶ is an apocalyptic number.

128626 is a deficient number, since it is larger than the sum of its proper divisors (67178).

128626 is an equidigital number, since it uses as much as digits as its factorization.

128626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its digits is 1152, while the sum is 25.

The square root of 128626 is about 358.6446709488. The cubic root of 128626 is about 50.4788657767.

The spelling of 128626 in words is "one hundred twenty-eight thousand, six hundred twenty-six".