128998126 has 8 divisors (see below), whose sum is σ = 193547880. Its totient is φ = 64482168.

The previous prime is 128998123. The next prime is 128998139. The reversal of 128998126 is 621899821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128998123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120 + ... + 17188.

It is an arithmetic number, because the mean of its divisors is an integer number (24193485).

Almost surely, 2^128998126 is an apocalyptic number.

128998126 is a deficient number, since it is larger than the sum of its proper divisors (64549754).

128998126 is a wasteful number, since it uses less digits than its factorization.

128998126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16898.

The product of its digits is 124416, while the sum is 46.

The square root of 128998126 is about 11357.7341930510. The cubic root of 128998126 is about 505.2749879650.

It can be divided in two parts, 12899 and 8126, that added together give a square (21025 = 145²).

The spelling of 128998126 in words is "one hundred twenty-eight million, nine hundred ninety-eight thousand, one hundred twenty-six".