128883750 has 40 divisors (see below), whose sum is σ = 322115640. Its totient is φ = 34368000.

The previous prime is 128883739. The next prime is 128883751. The reversal of 128883750 is 57388821.

It is a happy number.

It is a super-2 number, since 2×128883750² = 33222042028125000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128883751) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13435 + ... + 20934.

It is an arithmetic number, because the mean of its divisors is an integer number (8052891).

Almost surely, 2^128883750 is an apocalyptic number.

128883750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128883750 is an abundant number, since it is smaller than the sum of its proper divisors (193231890).

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

128883750 is an equidigital number, since it uses as much as digits as its factorization.

128883750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34394 (or 34379 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 128883750 is about 11352.6979172354. The cubic root of 128883750 is about 505.1256100311.

The spelling of 128883750 in words is "one hundred twenty-eight million, eight hundred eighty-three thousand, seven hundred fifty".