128831270 has 32 divisors (see below), whose sum is σ = 246131136. Its totient is φ = 48384000.

The previous prime is 128831251. The next prime is 128831281. The reversal of 128831270 is 72138821.

It is a super-2 number, since 2×128831270² = 33194992259625800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106670 + ... + 107870.

It is an arithmetic number, because the mean of its divisors is an integer number (7691598).

Almost surely, 2^128831270 is an apocalyptic number.

128831270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128831270 is a deficient number, since it is larger than the sum of its proper divisors (117299866).

128831270 is a wasteful number, since it uses less digits than its factorization.

128831270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 128831270 is about 11350.3863370372. The cubic root of 128831270 is about 505.0570402518.

The spelling of 128831270 in words is "one hundred twenty-eight million, eight hundred thirty-one thousand, two hundred seventy".