128807026 has 4 divisors (see below), whose sum is σ = 193210542. Its totient is φ = 64403512.

The previous prime is 128806999. The next prime is 128807033. The reversal of 128807026 is 620708821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 620708821 = 8093 ⋅76697.

It can be written as a sum of positive squares in only one way, i.e., 128799801 + 7225 = 11349^2 + 85^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128806982 and 128807000.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32201755 + ... + 32201758.

Almost surely, 2^128807026 is an apocalyptic number.

128807026 is a deficient number, since it is larger than the sum of its proper divisors (64403516).

128807026 is an equidigital number, since it uses as much as digits as its factorization.

128807026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64403515.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 128807026 is about 11349.3183055195. The cubic root of 128807026 is about 505.0253570250.

The spelling of 128807026 in words is "one hundred twenty-eight million, eight hundred seven thousand, twenty-six".