128627698 has 4 divisors (see below), whose sum is σ = 192941550. Its totient is φ = 64313848.

The previous prime is 128627693. The next prime is 128627713. The reversal of 128627698 is 896726821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 896726821 = 20129 ⋅44549.

It can be written as a sum of positive squares in only one way, i.e., 80227849 + 48399849 = 8957^2 + 6957^2 .

It is not an unprimeable number, because it can be changed into a prime (128627693) by changing a digit.

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 as a sum of consecutive naturals, namely, 32156923 + ... + 32156926.

Almost surely, 2^128627698 is an apocalyptic number.

128627698 is a deficient number, since it is larger than the sum of its proper divisors (64313852).

128627698 is an equidigital number, since it uses as much as digits as its factorization.

128627698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64313851.

The product of its digits is 580608, while the sum is 49.

The square root of 128627698 is about 11341.4151674295. The cubic root of 128627698 is about 504.7908790064.

The spelling of 128627698 in words is "one hundred twenty-eight million, six hundred twenty-seven thousand, six hundred ninety-eight".