128131330 has 16 divisors (see below), whose sum is σ = 230791680. Its totient is φ = 51218032.

The previous prime is 128131313. The next prime is 128131343. The reversal of 128131330 is 33131821.

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, 15711 + ... + 22429.

It is an arithmetic number, because the mean of its divisors is an integer number (14424480).

Almost surely, 2^128131330 is an apocalyptic number.

128131330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128131330 is a deficient number, since it is larger than the sum of its proper divisors (102660350).

128131330 is a wasteful number, since it uses less digits than its factorization.

128131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 128131330 is about 11319.5110318423. The cubic root of 128131330 is about 504.1407208680.

The spelling of 128131330 in words is "one hundred twenty-eight million, one hundred thirty-one thousand, three hundred thirty".