128751830 has 24 divisors (see below), whose sum is σ = 234837792. Its totient is φ = 50824176.

The previous prime is 128751827. The next prime is 128751859. The reversal of 128751830 is 38157821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61379 + ... + 63441.

It is an arithmetic number, because the mean of its divisors is an integer number (9784908).

Almost surely, 2^128751830 is an apocalyptic number.

128751830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128751830 is a deficient number, since it is larger than the sum of its proper divisors (106085962).

128751830 is an equidigital number, since it uses as much as digits as its factorization.

128751830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 128751830 is about 11346.8863570585. The cubic root of 128751830 is about 504.9532094020.

The spelling of 128751830 in words is "one hundred twenty-eight million, seven hundred fifty-one thousand, eight hundred thirty".