128788945 has 8 divisors (see below), whose sum is σ = 155991744. Its totient is φ = 102067824.

The previous prime is 128788927. The next prime is 128788949. The reversal of 128788945 is 549887821.

It is a happy number.

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 128788945 - 2¹³ = 128780753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128788892 and 128788901.

It is not an unprimeable number, because it can be changed into a prime (128788949) 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, 119829 + ... + 120898.

It is an arithmetic number, because the mean of its divisors is an integer number (19498968).

Almost surely, 2^128788945 is an apocalyptic number.

It is an amenable number.

128788945 is a deficient number, since it is larger than the sum of its proper divisors (27202799).

128788945 is a wasteful number, since it uses less digits than its factorization.

128788945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240839.

The product of its digits is 1290240, while the sum is 52.

The square root of 128788945 is about 11348.5217098968. The cubic root of 128788945 is about 505.0017253152.

The spelling of 128788945 in words is "one hundred twenty-eight million, seven hundred eighty-eight thousand, nine hundred forty-five".