128889698 has 24 divisors (see below), whose sum is σ = 229692672. Its totient is φ = 54061224.

The previous prime is 128889679. The next prime is 128889703. The reversal of 128889698 is 896988821.

It is a super-2 number, since 2×128889698² = 33225108501062408, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9386 + ... + 18597.

It is an arithmetic number, because the mean of its divisors is an integer number (9570528).

Almost surely, 2^128889698 is an apocalyptic number.

128889698 is a deficient number, since it is larger than the sum of its proper divisors (100802974).

128889698 is a wasteful number, since it uses less digits than its factorization.

128889698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28046 (or 28039 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 59.

The square root of 128889698 is about 11352.9598783753. The cubic root of 128889698 is about 505.1333804467.

The spelling of 128889698 in words is "one hundred twenty-eight million, eight hundred eighty-nine thousand, six hundred ninety-eight".