128758071 has 36 divisors (see below), whose sum is σ = 195748728. Its totient is φ = 74831328.

The previous prime is 128758037. The next prime is 128758073. The reversal of 128758071 is 170857821.

It is not a de Polignac number, because 128758071 - 2¹⁰ = 128757047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128758073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1629810 + ... + 1629888.

Almost surely, 2^128758071 is an apocalyptic number.

128758071 is a deficient number, since it is larger than the sum of its proper divisors (66990657).

128758071 is an equidigital number, since it uses as much as digits as its factorization.

128758071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 39.

The square root of 128758071 is about 11347.1613630899. The cubic root of 128758071 is about 504.9613681522.

Multiplying 128758071 by its sum of digits (39), we get a square (5021564769 = 70863²).

128758071 divided by its sum of digits (39) gives a square (3301489 = 1817²).

The spelling of 128758071 in words is "one hundred twenty-eight million, seven hundred fifty-eight thousand, seventy-one".