128228750 has 60 divisors (see below), whose sum is σ = 260691552. Its totient is φ = 47268000.

The previous prime is 128228731. The next prime is 128228753. The reversal of 128228750 is 57822821.

It is a super-2 number, since 2×128228750² = 32885224653125000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128228750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128228753) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 210947 + ... + 211553.

Almost surely, 2^128228750 is an apocalyptic number.

128228750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128228750 is an abundant number, since it is smaller than the sum of its proper divisors (132462802).

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

128228750 is an equidigital number, since it uses as much as digits as its factorization.

128228750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 128228750 is about 11323.8134036198. The cubic root of 128228750 is about 504.2684568586.

The spelling of 128228750 in words is "one hundred twenty-eight million, two hundred twenty-eight thousand, seven hundred fifty".