128962749 has 8 divisors (see below), whose sum is σ = 174306112. Its totient is φ = 84797280.

The previous prime is 128962741. The next prime is 128962751. The reversal of 128962749 is 947269821.

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

It is not a de Polignac number, because 128962749 - 2³ = 128962741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128962698 and 128962707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128962741) 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, 294217 + ... + 294654.

It is an arithmetic number, because the mean of its divisors is an integer number (21788264).

Almost surely, 2^128962749 is an apocalyptic number.

It is an amenable number.

128962749 is a deficient number, since it is larger than the sum of its proper divisors (45343363).

128962749 is an equidigital number, since it uses as much as digits as its factorization.

128962749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588947.

The product of its digits is 435456, while the sum is 48.

The square root of 128962749 is about 11356.1766893616. The cubic root of 128962749 is about 505.2287941479.

The spelling of 128962749 in words is "one hundred twenty-eight million, nine hundred sixty-two thousand, seven hundred forty-nine".