128677698 has 24 divisors (see below), whose sum is σ = 288416700. Its totient is φ = 41413344.

The previous prime is 128677697. The next prime is 128677729. The reversal of 128677698 is 896776821.

It can be written as a sum of positive squares in 2 ways, for example, as 122611329 + 6066369 = 11073^2 + 2463^2 .

It is not an unprimeable number, because it can be changed into a prime (128677697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122733 + ... + 123776.

Almost surely, 2^128677698 is an apocalyptic number.

128677698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128677698 is an abundant number, since it is smaller than the sum of its proper divisors (159739002).

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

128677698 is a wasteful number, since it uses less digits than its factorization.

128677698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246546 (or 246543 counting only the distinct ones).

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

The square root of 128677698 is about 11343.6192637094. The cubic root of 128677698 is about 504.8562777623.

The spelling of 128677698 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, six hundred ninety-eight".