128703015 has 96 divisors (see below), whose sum is σ = 268744320. Its totient is φ = 55738368.

The previous prime is 128702993. The next prime is 128703031. The reversal of 128703015 is 510307821.

It is not a de Polignac number, because 128703015 - 2⁸ = 128702759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128703015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 666759 + ... + 666951.

It is an arithmetic number, because the mean of its divisors is an integer number (2799420).

Almost surely, 2^128703015 is an apocalyptic number.

128703015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128703015 is an abundant number, since it is smaller than the sum of its proper divisors (140041305).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128703015 is a wasteful number, since it uses less digits than its factorization.

128703015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 128703015 is about 11344.7351225139. The cubic root of 128703015 is about 504.8893853079.

The spelling of 128703015 in words is "one hundred twenty-eight million, seven hundred three thousand, fifteen".