128403003500 has 24 divisors (see below), whose sum is σ = 280432160736. Its totient is φ = 51361201200.

The previous prime is 128403003481. The next prime is 128403003511. The reversal of 128403003500 is 5300304821.

It is a self number, because there is not a number n which added to its sum of digits gives 128403003500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128402504 + ... + 128403503.

It is an arithmetic number, because the mean of its divisors is an integer number (11684673364).

Almost surely, 2^128403003500 is an apocalyptic number.

128403003500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128403003500 is an abundant number, since it is smaller than the sum of its proper divisors (152029157236).

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

128403003500 is a wasteful number, since it uses less digits than its factorization.

128403003500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256806026 (or 256806014 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 128403003500 in words is "one hundred twenty-eight billion, four hundred three million, three thousand, five hundred".