128771874 has 96 divisors (see below), whose sum is σ = 354616704. Its totient is φ = 32797440.

The previous prime is 128771849. The next prime is 128771891. The reversal of 128771874 is 478177821.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72582 + ... + 74334.

It is an arithmetic number, because the mean of its divisors is an integer number (3693924).

Almost surely, 2^128771874 is an apocalyptic number.

128771874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128771874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177308352).

128771874 is an abundant number, since it is smaller than the sum of its proper divisors (225844830).

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

128771874 is a wasteful number, since it uses less digits than its factorization.

128771874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832 (or 1829 counting only the distinct ones).

The product of its digits is 175616, while the sum is 45.

The square root of 128771874 is about 11347.7695605789. The cubic root of 128771874 is about 504.9794116365.

The spelling of 128771874 in words is "one hundred twenty-eight million, seven hundred seventy-one thousand, eight hundred seventy-four".