128766798 has 12 divisors (see below), whose sum is σ = 278994768. Its totient is φ = 42922260.

The previous prime is 128766797. The next prime is 128766809. The reversal of 128766798 is 897667821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128766797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3576838 + ... + 3576873.

It is an arithmetic number, because the mean of its divisors is an integer number (23249564).

Almost surely, 2^128766798 is an apocalyptic number.

128766798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128766798 is an abundant number, since it is smaller than the sum of its proper divisors (150227970).

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

128766798 is a wasteful number, since it uses less digits than its factorization.

128766798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153719 (or 7153716 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 128766798 is about 11347.5459020883. The cubic root of 128766798 is about 504.9727763647.

The spelling of 128766798 in words is "one hundred twenty-eight million, seven hundred sixty-six thousand, seven hundred ninety-eight".