128788335 has 24 divisors (see below), whose sum is σ = 240405984. Its totient is φ = 63403200.

The previous prime is 128788307. The next prime is 128788337. The reversal of 128788335 is 533887821.

It is not a de Polignac number, because 128788335 - 2¹⁰ = 128787311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128788337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109491 + ... + 110660.

It is an arithmetic number, because the mean of its divisors is an integer number (10016916).

Almost surely, 2^128788335 is an apocalyptic number.

128788335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128788335 is a deficient number, since it is larger than the sum of its proper divisors (111617649).

128788335 is a wasteful number, since it uses less digits than its factorization.

128788335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220175 (or 220172 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 128788335 is about 11348.4948341179. The cubic root of 128788335 is about 505.0009280119. Note that the first 3 decimals are identical.

The spelling of 128788335 in words is "one hundred twenty-eight million, seven hundred eighty-eight thousand, three hundred thirty-five".