128733715 has 24 divisors (see below), whose sum is σ = 170548560. Its totient is φ = 93213120.

The previous prime is 128733713. The next prime is 128733749. The reversal of 128733715 is 517337821.

It is not a de Polignac number, because 128733715 - 2¹ = 128733713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128733713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235072 + ... + 235618.

It is an arithmetic number, because the mean of its divisors is an integer number (7106190).

Almost surely, 2^128733715 is an apocalyptic number.

128733715 is a deficient number, since it is larger than the sum of its proper divisors (41814845).

128733715 is a wasteful number, since it uses less digits than its factorization.

128733715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963 (or 952 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 128733715 is about 11346.0880923779. The cubic root of 128733715 is about 504.9295264857.

The spelling of 128733715 in words is "one hundred twenty-eight million, seven hundred thirty-three thousand, seven hundred fifteen".