128973500 has 24 divisors (see below), whose sum is σ = 281679216. Its totient is φ = 51589200.

The previous prime is 128973457. The next prime is 128973503. The reversal of 128973500 is 5379821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128973503) 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, 128474 + ... + 129473.

It is an arithmetic number, because the mean of its divisors is an integer number (11736634).

Almost surely, 2^128973500 is an apocalyptic number.

128973500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128973500 is an abundant number, since it is smaller than the sum of its proper divisors (152705716).

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

128973500 is a wasteful number, since it uses less digits than its factorization.

128973500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257966 (or 257954 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 128973500 is about 11356.6500342310. The cubic root of 128973500 is about 505.2428332506.

The spelling of 128973500 in words is "one hundred twenty-eight million, nine hundred seventy-three thousand, five hundred".