128471850 has 72 divisors (see below), whose sum is σ = 371728812. Its totient is φ = 31622400.

The previous prime is 128471753. The next prime is 128471867. The reversal of 128471850 is 58174821.

It can be written as a sum of positive squares in 6 ways, for example, as 41254929 + 87216921 = 6423^2 + 9339^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5131 + ... + 16830.

Almost surely, 2^128471850 is an apocalyptic number.

128471850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128471850 is an abundant number, since it is smaller than the sum of its proper divisors (243256962).

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

128471850 is a wasteful number, since it uses less digits than its factorization.

128471850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21992 (or 21984 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 128471850 is about 11334.5423374744. The cubic root of 128471850 is about 504.5869248955.

The spelling of 128471850 in words is "one hundred twenty-eight million, four hundred seventy-one thousand, eight hundred fifty".